diff --git a/src/poetry/packages/locker.py b/src/poetry/packages/locker.py
index ceadc1febf0..20c5ddb1519 100644
--- a/src/poetry/packages/locker.py
+++ b/src/poetry/packages/locker.py
@@ -109,8 +109,9 @@ def locked_repository(self) -> Repository:
             if source_type in ["directory", "file"]:
                 url = self._lock.path.parent.joinpath(url).resolve().as_posix()
 
+            name = info["name"]
             package = Package(
-                info["name"],
+                name,
                 info["version"],
                 info["version"],
                 source_type=source_type,
@@ -123,9 +124,19 @@ def locked_repository(self) -> Repository:
             package.category = info.get("category", "main")
             package.optional = info["optional"]
             metadata = cast("dict[str, Any]", lock_data["metadata"])
-            name = info["name"]
-            if "hashes" in metadata:
-                # Old lock so we create dummy files from the hashes
+
+            # Storing of package files and hashes has been through a few generations in
+            # the lockfile, we can read them all:
+            #
+            # - latest and preferred is that this is read per package, from
+            #   package.files
+            # - oldest is that hashes were stored in metadata.hashes without filenames
+            # - in between those two, hashes were stored alongside filenames in
+            #   metadata.files
+            package_files = info.get("files")
+            if package_files is not None:
+                package.files = package_files
+            elif "hashes" in metadata:
                 hashes = cast("dict[str, Any]", metadata["hashes"])
                 package.files = [{"name": h, "hash": h} for h in hashes[name]]
             elif source_type in {"git", "directory", "url"}:
@@ -226,8 +237,6 @@ def set_lock_data(self, root: Package, packages: list[Package]) -> bool:
                 assert isinstance(package_files, Array)
                 files[package["name"]] = package_files.multiline(True)
 
-            del package["files"]
-
         lock = document()
         lock["package"] = package_specs
 
@@ -241,6 +250,7 @@ def set_lock_data(self, root: Package, packages: list[Package]) -> bool:
             "lock-version": self._VERSION,
             "python-versions": root.python_versions,
             "content-hash": self._content_hash,
+            # TODO stop writing files here, this is deprecated.
             "files": files,
         }
 
diff --git a/tests/fixtures/old_lock/poetry.lock b/tests/fixtures/old_lock/poetry.lock
index 498df2edc9f..b69ab8e66e0 100644
--- a/tests/fixtures/old_lock/poetry.lock
+++ b/tests/fixtures/old_lock/poetry.lock
@@ -6,6 +6,18 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 version = "1.3.1"
 
+[[package.files]]
+file = "sampleproject-1.3.1-py2.py3-none-any.whl"
+hash = "sha256:26c9172e08244873b0e09c574a229bf2c251c67723a05e08fd3ec0c5ee423796"
+
+[[package.files]]
+file = "sampleproject-1.3.1-py3-none-any.whl"
+hash = "sha256:75bb5bb4e74a1b77dc0cff25ebbacb54fe1318aaf99a86a036cefc86ed885ced"
+
+[[package.files]]
+file = "sampleproject-1.3.1.tar.gz"
+hash = "sha256:3593ca2f1e057279d70d6144b14472fb28035b1da213dde60906b703d6f82c55"
+
 [metadata]
 content-hash = "c8c2c9d899e47bac3972e029ef0e71b75d5df98a28eebef25a75640a19aac177"
 lock-version = "1.0"
diff --git a/tests/fixtures/old_lock/updated.lock b/tests/fixtures/old_lock/updated.lock
deleted file mode 100644
index 22cd049e68f..00000000000
--- a/tests/fixtures/old_lock/updated.lock
+++ /dev/null
@@ -1,152 +0,0 @@
-[[package]]
-name = "certifi"
-version = "2020.6.20"
-description = "Python package for providing Mozilla's CA Bundle."
-category = "main"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "chardet"
-version = "3.0.4"
-description = "Universal encoding detector for Python 2 and 3"
-category = "main"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "docker"
-version = "4.3.1"
-description = "A Python library for the Docker Engine API."
-category = "main"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
-[package.dependencies]
-pywin32 = {version = "227", markers = "sys_platform == \"win32\""}
-requests = ">=2.14.2,<2.18.0 || >2.18.0"
-six = ">=1.4.0"
-websocket-client = ">=0.32.0"
-
-[package.extras]
-ssh = ["paramiko (>=2.4.2)"]
-tls = ["pyOpenSSL (>=17.5.0)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
-
-[[package]]
-name = "idna"
-version = "2.10"
-description = "Internationalized Domain Names in Applications (IDNA)"
-category = "main"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[[package]]
-name = "pywin32"
-version = "227"
-description = "Python for Window Extensions"
-category = "main"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "requests"
-version = "2.24.0"
-description = "Python HTTP for Humans."
-category = "main"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
-[package.dependencies]
-certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<4"
-idna = ">=2.5,<3"
-urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
-
-[package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
-
-[[package]]
-name = "six"
-version = "1.15.0"
-description = "Python 2 and 3 compatibility utilities"
-category = "main"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-
-[[package]]
-name = "urllib3"
-version = "1.25.10"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
-category = "main"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-
-[package.extras]
-brotli = ["brotlipy (>=0.6.0)"]
-secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
-
-[[package]]
-name = "websocket-client"
-version = "0.57.0"
-description = "WebSocket client for Python. hybi13 is supported."
-category = "main"
-optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[package.dependencies]
-six = "*"
-
-[metadata]
-lock-version = "1.1"
-python-versions = "^3.8"
-content-hash = "bb4c2f3c089b802c1930b6acbeed04711d93e9cdfd9a003eb17518a6d9f350c6"
-
-[metadata.files]
-certifi = [
-    {file = "certifi-2020.6.20-py2.py3-none-any.whl", hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"},
-    {file = "certifi-2020.6.20.tar.gz", hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"},
-]
-chardet = [
-    {file = "chardet-3.0.4-py2.py3-none-any.whl", hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"},
-    {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
-]
-docker = [
-    {file = "docker-4.3.1-py2.py3-none-any.whl", hash = "sha256:13966471e8bc23b36bfb3a6fb4ab75043a5ef1dac86516274777576bed3b9828"},
-    {file = "docker-4.3.1.tar.gz", hash = "sha256:bad94b8dd001a8a4af19ce4becc17f41b09f228173ffe6a4e0355389eef142f2"},
-]
-idna = [
-    {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
-    {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
-]
-pywin32 = [
-    {file = "pywin32-227-cp27-cp27m-win32.whl", hash = "sha256:371fcc39416d736401f0274dd64c2302728c9e034808e37381b5e1b22be4a6b0"},
-    {file = "pywin32-227-cp27-cp27m-win_amd64.whl", hash = "sha256:4cdad3e84191194ea6d0dd1b1b9bdda574ff563177d2adf2b4efec2a244fa116"},
-    {file = "pywin32-227-cp35-cp35m-win32.whl", hash = "sha256:f4c5be1a293bae0076d93c88f37ee8da68136744588bc5e2be2f299a34ceb7aa"},
-    {file = "pywin32-227-cp35-cp35m-win_amd64.whl", hash = "sha256:a929a4af626e530383a579431b70e512e736e9588106715215bf685a3ea508d4"},
-    {file = "pywin32-227-cp36-cp36m-win32.whl", hash = "sha256:300a2db938e98c3e7e2093e4491439e62287d0d493fe07cce110db070b54c0be"},
-    {file = "pywin32-227-cp36-cp36m-win_amd64.whl", hash = "sha256:9b31e009564fb95db160f154e2aa195ed66bcc4c058ed72850d047141b36f3a2"},
-    {file = "pywin32-227-cp37-cp37m-win32.whl", hash = "sha256:47a3c7551376a865dd8d095a98deba954a98f326c6fe3c72d8726ca6e6b15507"},
-    {file = "pywin32-227-cp37-cp37m-win_amd64.whl", hash = "sha256:31f88a89139cb2adc40f8f0e65ee56a8c585f629974f9e07622ba80199057511"},
-    {file = "pywin32-227-cp38-cp38-win32.whl", hash = "sha256:7f18199fbf29ca99dff10e1f09451582ae9e372a892ff03a28528a24d55875bc"},
-    {file = "pywin32-227-cp38-cp38-win_amd64.whl", hash = "sha256:7c1ae32c489dc012930787f06244426f8356e129184a02c25aef163917ce158e"},
-    {file = "pywin32-227-cp39-cp39-win32.whl", hash = "sha256:c054c52ba46e7eb6b7d7dfae4dbd987a1bb48ee86debe3f245a2884ece46e295"},
-    {file = "pywin32-227-cp39-cp39-win_amd64.whl", hash = "sha256:f27cec5e7f588c3d1051651830ecc00294f90728d19c3bf6916e6dba93ea357c"},
-]
-requests = [
-    {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
-    {file = "requests-2.24.0.tar.gz", hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"},
-]
-six = [
-    {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
-    {file = "six-1.15.0.tar.gz", hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"},
-]
-urllib3 = [
-    {file = "urllib3-1.25.10-py2.py3-none-any.whl", hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"},
-    {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
-]
-websocket-client = [
-    {file = "websocket_client-0.57.0-py2.py3-none-any.whl", hash = "sha256:0fc45c961324d79c781bab301359d5a1b00b13ad1b10415a4780229ef71a5549"},
-    {file = "websocket_client-0.57.0.tar.gz", hash = "sha256:d735b91d6d1692a6a181f2a8c9e0238e5f6373356f561bb9dc4c7af36f452010"},
-]
diff --git a/tests/fixtures/outdated_lock/poetry.lock b/tests/fixtures/outdated_lock/poetry.lock
index 1d950ca7c10..0eef56ef0b6 100644
--- a/tests/fixtures/outdated_lock/poetry.lock
+++ b/tests/fixtures/outdated_lock/poetry.lock
@@ -6,6 +6,14 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "certifi-2020.6.20-py2.py3-none-any.whl"
+hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"
+
+[[package.files]]
+file = "certifi-2020.6.20.tar.gz"
+hash = "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3"
+
 [[package]]
 name = "chardet"
 version = "3.0.4"
@@ -14,6 +22,14 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "chardet-3.0.4-py2.py3-none-any.whl"
+hash = "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"
+
+[[package.files]]
+file = "chardet-3.0.4.tar.gz"
+hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"
+
 [[package]]
 name = "docker"
 version = "4.3.0"
@@ -22,6 +38,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package.files]]
+file = "docker-4.3.0-py2.py3-none-any.whl"
+hash = "sha256:ba118607b0ba6bfc1b236ec32019a355c47b5d012d01d976467d4692ef443929"
+
+[[package.files]]
+file = "docker-4.3.0.tar.gz"
+hash = "sha256:431a268f2caf85aa30613f9642da274c62f6ee8bae7d70d968e01529f7d6af93"
+
 [package.dependencies]
 pywin32 = {version = "227", markers = "sys_platform == \"win32\""}
 requests = ">=2.14.2,<2.18.0 || >2.18.0"
@@ -40,6 +64,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "idna-2.10-py2.py3-none-any.whl"
+hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
+
+[[package.files]]
+file = "idna-2.10.tar.gz"
+hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"
+
 [[package]]
 name = "pywin32"
 version = "227"
@@ -48,6 +80,54 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "pywin32-227-cp27-cp27m-win32.whl"
+hash = "sha256:371fcc39416d736401f0274dd64c2302728c9e034808e37381b5e1b22be4a6b0"
+
+[[package.files]]
+file = "pywin32-227-cp27-cp27m-win_amd64.whl"
+hash = "sha256:4cdad3e84191194ea6d0dd1b1b9bdda574ff563177d2adf2b4efec2a244fa116"
+
+[[package.files]]
+file = "pywin32-227-cp35-cp35m-win32.whl"
+hash = "sha256:f4c5be1a293bae0076d93c88f37ee8da68136744588bc5e2be2f299a34ceb7aa"
+
+[[package.files]]
+file = "pywin32-227-cp35-cp35m-win_amd64.whl"
+hash = "sha256:a929a4af626e530383a579431b70e512e736e9588106715215bf685a3ea508d4"
+
+[[package.files]]
+file = "pywin32-227-cp36-cp36m-win32.whl"
+hash = "sha256:300a2db938e98c3e7e2093e4491439e62287d0d493fe07cce110db070b54c0be"
+
+[[package.files]]
+file = "pywin32-227-cp36-cp36m-win_amd64.whl"
+hash = "sha256:9b31e009564fb95db160f154e2aa195ed66bcc4c058ed72850d047141b36f3a2"
+
+[[package.files]]
+file = "pywin32-227-cp37-cp37m-win32.whl"
+hash = "sha256:47a3c7551376a865dd8d095a98deba954a98f326c6fe3c72d8726ca6e6b15507"
+
+[[package.files]]
+file = "pywin32-227-cp37-cp37m-win_amd64.whl"
+hash = "sha256:31f88a89139cb2adc40f8f0e65ee56a8c585f629974f9e07622ba80199057511"
+
+[[package.files]]
+file = "pywin32-227-cp38-cp38-win32.whl"
+hash = "sha256:7f18199fbf29ca99dff10e1f09451582ae9e372a892ff03a28528a24d55875bc"
+
+[[package.files]]
+file = "pywin32-227-cp38-cp38-win_amd64.whl"
+hash = "sha256:7c1ae32c489dc012930787f06244426f8356e129184a02c25aef163917ce158e"
+
+[[package.files]]
+file = "pywin32-227-cp39-cp39-win32.whl"
+hash = "sha256:c054c52ba46e7eb6b7d7dfae4dbd987a1bb48ee86debe3f245a2884ece46e295"
+
+[[package.files]]
+file = "pywin32-227-cp39-cp39-win_amd64.whl"
+hash = "sha256:f27cec5e7f588c3d1051651830ecc00294f90728d19c3bf6916e6dba93ea357c"
+
 [[package]]
 name = "requests"
 version = "2.24.0"
@@ -56,6 +136,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package.files]]
+file = "requests-2.24.0-py2.py3-none-any.whl"
+hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"
+
+[[package.files]]
+file = "requests-2.24.0.tar.gz"
+hash = "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b"
+
 [package.dependencies]
 certifi = ">=2017.4.17"
 chardet = ">=3.0.2,<4"
@@ -74,6 +162,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package.files]]
+file = "six-1.15.0-py2.py3-none-any.whl"
+hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
+
+[[package.files]]
+file = "six-1.15.0.tar.gz"
+hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"
+
 [[package]]
 name = "urllib3"
 version = "1.25.10"
@@ -82,6 +178,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
+[[package.files]]
+file = "urllib3-1.25.10-py2.py3-none-any.whl"
+hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"
+
+[[package.files]]
+file = "urllib3-1.25.10.tar.gz"
+hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"
+
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
@@ -95,6 +199,14 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "websocket_client-0.57.0-py2.py3-none-any.whl"
+hash = "sha256:0fc45c961324d79c781bab301359d5a1b00b13ad1b10415a4780229ef71a5549"
+
+[[package.files]]
+file = "websocket_client-0.57.0.tar.gz"
+hash = "sha256:d735b91d6d1692a6a181f2a8c9e0238e5f6373356f561bb9dc4c7af36f452010"
+
 [package.dependencies]
 six = "*"
 
diff --git a/tests/fixtures/up_to_date_lock/poetry.lock b/tests/fixtures/up_to_date_lock/poetry.lock
index a896b5d0621..3a9340461cc 100644
--- a/tests/fixtures/up_to_date_lock/poetry.lock
+++ b/tests/fixtures/up_to_date_lock/poetry.lock
@@ -6,6 +6,14 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "certifi-2020.12.5-py2.py3-none-any.whl"
+hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"
+
+[[package.files]]
+file = "certifi-2020.12.5.tar.gz"
+hash = "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c"
+
 [[package]]
 name = "chardet"
 version = "4.0.0"
@@ -14,6 +22,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package.files]]
+file = "chardet-4.0.0-py2.py3-none-any.whl"
+hash = "sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5"
+
+[[package.files]]
+file = "chardet-4.0.0.tar.gz"
+hash = "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa"
+
 [[package]]
 name = "docker"
 version = "4.3.1"
@@ -22,6 +38,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package.files]]
+file = "docker-4.3.1-py2.py3-none-any.whl"
+hash = "sha256:13966471e8bc23b36bfb3a6fb4ab75043a5ef1dac86516274777576bed3b9828"
+
+[[package.files]]
+file = "docker-4.3.1.tar.gz"
+hash = "sha256:bad94b8dd001a8a4af19ce4becc17f41b09f228173ffe6a4e0355389eef142f2"
+
 [package.dependencies]
 pywin32 = {version = "227", markers = "sys_platform == \"win32\""}
 requests = ">=2.14.2,<2.18.0 || >2.18.0"
@@ -40,6 +64,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "idna-2.10-py2.py3-none-any.whl"
+hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
+
+[[package.files]]
+file = "idna-2.10.tar.gz"
+hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"
+
 [[package]]
 name = "pywin32"
 version = "227"
@@ -48,6 +80,54 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "pywin32-227-cp27-cp27m-win32.whl"
+hash = "sha256:371fcc39416d736401f0274dd64c2302728c9e034808e37381b5e1b22be4a6b0"
+
+[[package.files]]
+file = "pywin32-227-cp27-cp27m-win_amd64.whl"
+hash = "sha256:4cdad3e84191194ea6d0dd1b1b9bdda574ff563177d2adf2b4efec2a244fa116"
+
+[[package.files]]
+file = "pywin32-227-cp35-cp35m-win32.whl"
+hash = "sha256:f4c5be1a293bae0076d93c88f37ee8da68136744588bc5e2be2f299a34ceb7aa"
+
+[[package.files]]
+file = "pywin32-227-cp35-cp35m-win_amd64.whl"
+hash = "sha256:a929a4af626e530383a579431b70e512e736e9588106715215bf685a3ea508d4"
+
+[[package.files]]
+file = "pywin32-227-cp36-cp36m-win32.whl"
+hash = "sha256:300a2db938e98c3e7e2093e4491439e62287d0d493fe07cce110db070b54c0be"
+
+[[package.files]]
+file = "pywin32-227-cp36-cp36m-win_amd64.whl"
+hash = "sha256:9b31e009564fb95db160f154e2aa195ed66bcc4c058ed72850d047141b36f3a2"
+
+[[package.files]]
+file = "pywin32-227-cp37-cp37m-win32.whl"
+hash = "sha256:47a3c7551376a865dd8d095a98deba954a98f326c6fe3c72d8726ca6e6b15507"
+
+[[package.files]]
+file = "pywin32-227-cp37-cp37m-win_amd64.whl"
+hash = "sha256:31f88a89139cb2adc40f8f0e65ee56a8c585f629974f9e07622ba80199057511"
+
+[[package.files]]
+file = "pywin32-227-cp38-cp38-win32.whl"
+hash = "sha256:7f18199fbf29ca99dff10e1f09451582ae9e372a892ff03a28528a24d55875bc"
+
+[[package.files]]
+file = "pywin32-227-cp38-cp38-win_amd64.whl"
+hash = "sha256:7c1ae32c489dc012930787f06244426f8356e129184a02c25aef163917ce158e"
+
+[[package.files]]
+file = "pywin32-227-cp39-cp39-win32.whl"
+hash = "sha256:c054c52ba46e7eb6b7d7dfae4dbd987a1bb48ee86debe3f245a2884ece46e295"
+
+[[package.files]]
+file = "pywin32-227-cp39-cp39-win_amd64.whl"
+hash = "sha256:f27cec5e7f588c3d1051651830ecc00294f90728d19c3bf6916e6dba93ea357c"
+
 [[package]]
 name = "requests"
 version = "2.25.1"
@@ -56,6 +136,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package.files]]
+file = "requests-2.25.1-py2.py3-none-any.whl"
+hash = "sha256:c210084e36a42ae6b9219e00e48287def368a26d03a048ddad7bfee44f75871e"
+
+[[package.files]]
+file = "requests-2.25.1.tar.gz"
+hash = "sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804"
+
 [package.dependencies]
 certifi = ">=2017.4.17"
 chardet = ">=3.0.2,<5"
@@ -74,6 +162,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package.files]]
+file = "six-1.15.0-py2.py3-none-any.whl"
+hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
+
+[[package.files]]
+file = "six-1.15.0.tar.gz"
+hash = "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"
+
 [[package]]
 name = "urllib3"
 version = "1.26.3"
@@ -82,6 +178,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
+[[package.files]]
+file = "urllib3-1.26.3-py2.py3-none-any.whl"
+hash = "sha256:1b465e494e3e0d8939b50680403e3aedaa2bc434b7d5af64dfd3c958d7f5ae80"
+
+[[package.files]]
+file = "urllib3-1.26.3.tar.gz"
+hash = "sha256:de3eedaad74a2683334e282005cd8d7f22f4d55fa690a2a1020a416cb0a47e73"
+
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
@@ -95,6 +199,14 @@ category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "websocket_client-0.58.0-py2.py3-none-any.whl"
+hash = "sha256:44b5df8f08c74c3d82d28100fdc81f4536809ce98a17f0757557813275fbb663"
+
+[[package.files]]
+file = "websocket_client-0.58.0.tar.gz"
+hash = "sha256:63509b41d158ae5b7f67eb4ad20fecbb4eee99434e73e140354dc3ff8e09716f"
+
 [package.dependencies]
 six = "*"
 
diff --git a/tests/installation/fixtures/extras-with-dependencies.test b/tests/installation/fixtures/extras-with-dependencies.test
index d0a63bfb879..c6f8dad346b 100644
--- a/tests/installation/fixtures/extras-with-dependencies.test
+++ b/tests/installation/fixtures/extras-with-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -21,6 +23,7 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
+files = []
 
 [package.dependencies]
 D = "^1.0"
@@ -32,6 +35,7 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
+files = []
 
 [extras]
 foo = ["C"]
diff --git a/tests/installation/fixtures/extras.test b/tests/installation/fixtures/extras.test
index 3b4086ab18a..86b959002e5 100644
--- a/tests/installation/fixtures/extras.test
+++ b/tests/installation/fixtures/extras.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -21,6 +23,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "D"
@@ -29,6 +32,7 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
+files = []
 
 [extras]
 foo = ["D"]
diff --git a/tests/installation/fixtures/install-no-dev.test b/tests/installation/fixtures/install-no-dev.test
index c966c56baa0..ec1b0c0248d 100644
--- a/tests/installation/fixtures/install-no-dev.test
+++ b/tests/installation/fixtures/install-no-dev.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -21,6 +23,7 @@ description = ""
 category = "dev"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/remove.test b/tests/installation/fixtures/remove.test
index d0aea7a7b3e..e651474f509 100644
--- a/tests/installation/fixtures/remove.test
+++ b/tests/installation/fixtures/remove.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/update-with-lock.test b/tests/installation/fixtures/update-with-lock.test
index 4856157ff5e..728e198b30a 100644
--- a/tests/installation/fixtures/update-with-lock.test
+++ b/tests/installation/fixtures/update-with-lock.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/update-with-locked-extras.test b/tests/installation/fixtures/update-with-locked-extras.test
index 3609212e222..ab0b6b850e3 100644
--- a/tests/installation/fixtures/update-with-locked-extras.test
+++ b/tests/installation/fixtures/update-with-locked-extras.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 "B" = {version = "^1.0", optional = true}
@@ -20,6 +21,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -28,6 +30,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "D"
@@ -36,6 +39,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-category-change.test b/tests/installation/fixtures/with-category-change.test
index f431f92ba0e..54c9f1ebe62 100644
--- a/tests/installation/fixtures/with-category-change.test
+++ b/tests/installation/fixtures/with-category-change.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 A = "^1.0"
diff --git a/tests/installation/fixtures/with-conditional-dependency.test b/tests/installation/fixtures/with-conditional-dependency.test
index 78546a5c96a..a261b741e93 100644
--- a/tests/installation/fixtures/with-conditional-dependency.test
+++ b/tests/installation/fixtures/with-conditional-dependency.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = ">=3.5"
+files = []
 
 [package.requirements]
 python = ">=3.5,<4.0"
@@ -16,6 +17,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = ">=3.6"
+files = []
 
 [package.requirements]
 python = ">=3.6,<4.0"
diff --git a/tests/installation/fixtures/with-dependencies-extras.test b/tests/installation/fixtures/with-dependencies-extras.test
index 042e29670e1..e6f6c8b1338 100644
--- a/tests/installation/fixtures/with-dependencies-extras.test
+++ b/tests/installation/fixtures/with-dependencies-extras.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = {version = "^1.0", optional = true}
@@ -27,6 +29,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-dependencies-nested-extras.test b/tests/installation/fixtures/with-dependencies-nested-extras.test
index 369aa3cd74b..c4360d0cd27 100644
--- a/tests/installation/fixtures/with-dependencies-nested-extras.test
+++ b/tests/installation/fixtures/with-dependencies-nested-extras.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = {version = "^1.0", optional = true, extras = ["C"]}
@@ -19,6 +20,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = {version = "^1.0", optional = true}
@@ -33,6 +35,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-dependencies.test b/tests/installation/fixtures/with-dependencies.test
index e9ed46612a0..74699a91dd9 100644
--- a/tests/installation/fixtures/with-dependencies.test
+++ b/tests/installation/fixtures/with-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-directory-dependency-poetry-transitive.test b/tests/installation/fixtures/with-directory-dependency-poetry-transitive.test
index fb10b1accea..223b4b287cf 100644
--- a/tests/installation/fixtures/with-directory-dependency-poetry-transitive.test
+++ b/tests/installation/fixtures/with-directory-dependency-poetry-transitive.test
@@ -6,6 +6,10 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "0.1.0"
 
+[[package.files]]
+file = "demo-0.1.0-py2.py3-none-any.whl"
+hash = "sha256:70e704135718fffbcbf61ed1fc45933cfd86951a744b681000eaaa75da31f17a"
+
 [package.dependencies]
 pendulum = ">=1.4.4"
 
@@ -24,6 +28,7 @@ develop = false
 name = "inner-directory-project"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.4"
 
 [package.source]
@@ -36,6 +41,7 @@ description = ""
 name = "pendulum"
 optional = false
 python-versions = "*"
+files = []
 version = "1.4.4"
 
 [[package]]
@@ -45,6 +51,7 @@ develop = false
 name = "project-with-extras"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.3"
 
 [package.extras]
@@ -62,6 +69,7 @@ develop = false
 name = "project-with-transitive-directory-dependencies"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.3"
 
 [package.dependencies]
@@ -79,6 +87,7 @@ develop = false
 name = "project-with-transitive-file-dependencies"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.3"
 
 [package.dependencies]
diff --git a/tests/installation/fixtures/with-directory-dependency-poetry.test b/tests/installation/fixtures/with-directory-dependency-poetry.test
index 12431f62185..eab2b8e8a7a 100644
--- a/tests/installation/fixtures/with-directory-dependency-poetry.test
+++ b/tests/installation/fixtures/with-directory-dependency-poetry.test
@@ -4,6 +4,7 @@ category = "main"
 name = "pendulum"
 optional = false
 python-versions = "*"
+files = []
 version = "1.4.4"
 
 [[package]]
@@ -13,6 +14,7 @@ develop = false
 name = "project-with-extras"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.3"
 
 [package.dependencies]
diff --git a/tests/installation/fixtures/with-directory-dependency-setuptools.test b/tests/installation/fixtures/with-directory-dependency-setuptools.test
index f02bd82a335..b6bf29946a6 100644
--- a/tests/installation/fixtures/with-directory-dependency-setuptools.test
+++ b/tests/installation/fixtures/with-directory-dependency-setuptools.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "pendulum"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "project-with-setup"
@@ -22,6 +24,7 @@ description = "Demo project."
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.source]
 type = "directory"
diff --git a/tests/installation/fixtures/with-duplicate-dependencies-update.test b/tests/installation/fixtures/with-duplicate-dependencies-update.test
index f29945e71a8..faec4acd70a 100644
--- a/tests/installation/fixtures/with-duplicate-dependencies-update.test
+++ b/tests/installation/fixtures/with-duplicate-dependencies-update.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = "^2.0"
@@ -16,6 +17,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = "1.5"
@@ -27,6 +29,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-duplicate-dependencies.test b/tests/installation/fixtures/with-duplicate-dependencies.test
index 75126501ef8..18ea4efe5bd 100644
--- a/tests/installation/fixtures/with-duplicate-dependencies.test
+++ b/tests/installation/fixtures/with-duplicate-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = [
@@ -19,6 +20,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = "1.2"
@@ -30,6 +32,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = "1.5"
@@ -41,6 +44,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -49,6 +53,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-file-dependency-transitive.test b/tests/installation/fixtures/with-file-dependency-transitive.test
index b882f262640..6ea4aad8e9a 100644
--- a/tests/installation/fixtures/with-file-dependency-transitive.test
+++ b/tests/installation/fixtures/with-file-dependency-transitive.test
@@ -6,6 +6,10 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "0.1.0"
 
+[[package.files]]
+file = "demo-0.1.0-py2.py3-none-any.whl"
+hash = "sha256:70e704135718fffbcbf61ed1fc45933cfd86951a744b681000eaaa75da31f17a"
+
 [package.dependencies]
 pendulum = ">=1.4.4"
 
@@ -24,6 +28,7 @@ develop = false
 name = "inner-directory-project"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.4"
 
 [package.source]
@@ -36,6 +41,7 @@ description = ""
 name = "pendulum"
 optional = false
 python-versions = "*"
+files = []
 version = "1.4.4"
 
 [[package]]
@@ -45,6 +51,7 @@ develop = false
 name = "project-with-transitive-file-dependencies"
 optional = false
 python-versions = "*"
+files = []
 version = "1.2.3"
 
 [package.dependencies]
diff --git a/tests/installation/fixtures/with-file-dependency.test b/tests/installation/fixtures/with-file-dependency.test
index 06ad019c0f4..6ba34523535 100644
--- a/tests/installation/fixtures/with-file-dependency.test
+++ b/tests/installation/fixtures/with-file-dependency.test
@@ -6,6 +6,10 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "demo-0.1.0-py2.py3-none-any.whl"
+hash = "sha256:70e704135718fffbcbf61ed1fc45933cfd86951a744b681000eaaa75da31f17a"
+
 [package.source]
 type = "file"
 url = "tests/fixtures/distributions/demo-0.1.0-py2.py3-none-any.whl"
@@ -24,6 +28,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-multiple-updates.test b/tests/installation/fixtures/with-multiple-updates.test
index a488ef79631..b00bde40fd9 100644
--- a/tests/installation/fixtures/with-multiple-updates.test
+++ b/tests/installation/fixtures/with-multiple-updates.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = ">=1.0.1"
@@ -20,6 +21,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -28,6 +30,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -36,6 +39,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "~2.7 || ^3.4"
diff --git a/tests/installation/fixtures/with-optional-dependencies.test b/tests/installation/fixtures/with-optional-dependencies.test
index 6c172caa078..f56bdfac4f0 100644
--- a/tests/installation/fixtures/with-optional-dependencies.test
+++ b/tests/installation/fixtures/with-optional-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 D = "^1.2"
@@ -24,6 +26,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [extras]
 foo = ["A"]
diff --git a/tests/installation/fixtures/with-platform-dependencies.test b/tests/installation/fixtures/with-platform-dependencies.test
index 9696b74fb9a..397145c4384 100644
--- a/tests/installation/fixtures/with-platform-dependencies.test
+++ b/tests/installation/fixtures/with-platform-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = true
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -21,6 +23,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 D = "^1.2"
@@ -32,6 +35,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [extras]
 foo = ["A"]
diff --git a/tests/installation/fixtures/with-prereleases.test b/tests/installation/fixtures/with-prereleases.test
index c164800cb80..fb6121dbd6d 100644
--- a/tests/installation/fixtures/with-prereleases.test
+++ b/tests/installation/fixtures/with-prereleases.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-pypi-repository.test b/tests/installation/fixtures/with-pypi-repository.test
index 1bde9b82750..ddd396931af 100644
--- a/tests/installation/fixtures/with-pypi-repository.test
+++ b/tests/installation/fixtures/with-pypi-repository.test
@@ -6,6 +6,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "attrs-17.4.0-py2.py3-none-any.whl"
+hash = "sha256:a17a9573a6f475c99b551c0e0a812707ddda1ec9653bed04c13841404ed6f450"
+
+[[package.files]]
+file = "attrs-17.4.0.tar.gz"
+hash = "sha256:1c7960ccfd6a005cd9f7ba884e6316b5e430a3f1a6c37c5f87d8b43f83b54ec9"
+
 [package.extras]
 dev = ["coverage", "hypothesis", "pympler", "pytest", "six", "sphinx", "zope.interface", "zope.interface"]
 docs = ["sphinx", "zope.interface"]
@@ -19,6 +27,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "colorama-0.3.9-py2.py3-none-any.whl"
+hash = "sha256:463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda"
+
+[[package.files]]
+file = "colorama-0.3.9.tar.gz"
+hash = "sha256:48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"
+
 [[package]]
 name = "funcsigs"
 version = "1.0.2"
@@ -27,6 +43,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "funcsigs-1.0.2-py2.py3-none-any.whl"
+hash = "sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca"
+
+[[package.files]]
+file = "funcsigs-1.0.2.tar.gz"
+hash = "sha256:a7bb0f2cf3a3fd1ab2732cb49eba4252c2af4240442415b4abce3b87022a8f50"
+
 [[package]]
 name = "more-itertools"
 version = "4.1.0"
@@ -35,6 +59,18 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "more-itertools-4.1.0.tar.gz"
+hash = "sha256:c9ce7eccdcb901a2c75d326ea134e0886abfbea5f93e91cc95de9507c0816c44"
+
+[[package.files]]
+file = "more_itertools-4.1.0-py2-none-any.whl"
+hash = "sha256:11a625025954c20145b37ff6309cd54e39ca94f72f6bb9576d1195db6fa2442e"
+
+[[package.files]]
+file = "more_itertools-4.1.0-py3-none-any.whl"
+hash = "sha256:0dd8f72eeab0d2c3bd489025bb2f6a1b8342f9b198f6fc37b52d15cfa4531fea"
+
 [package.dependencies]
 six = ">=1.0.0,<2.0.0"
 
@@ -46,6 +82,10 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "pluggy-0.6.0.tar.gz"
+hash = "sha256:7f8ae7f5bdf75671a718d2daf0a64b7885f74510bcd98b1a0bb420eb9a9d0cff"
+
 [[package]]
 name = "py"
 version = "1.5.3"
@@ -54,6 +94,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "py-1.5.3-py2.py3-none-any.whl"
+hash = "sha256:983f77f3331356039fdd792e9220b7b8ee1aa6bd2b25f567a963ff1de5a64f6a"
+
+[[package.files]]
+file = "py-1.5.3.tar.gz"
+hash = "sha256:29c9fab495d7528e80ba1e343b958684f4ace687327e6f789a94bf3d1915f881"
+
 [[package]]
 name = "pytest"
 version = "3.5.0"
@@ -62,6 +110,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "pytest-3.5.0-py2.py3-none-any.whl"
+hash = "sha256:6266f87ab64692112e5477eba395cfedda53b1933ccd29478e671e73b420c19c"
+
+[[package.files]]
+file = "pytest-3.5.0.tar.gz"
+hash = "sha256:fae491d1874f199537fd5872b5e1f0e74a009b979df9d53d1553fd03da1703e1"
+
 [package.dependencies]
 py = ">=1.5.0"
 six = ">=1.10.0"
@@ -80,6 +136,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*"
 
+[[package.files]]
+file = "setuptools-39.2.0-py2.py3-none-any.whl"
+hash = "sha256:8fca9275c89964f13da985c3656cb00ba029d7f3916b37990927ffdf264e7926"
+
+[[package.files]]
+file = "setuptools-39.2.0.zip"
+hash = "sha256:f7cddbb5f5c640311eb00eab6e849f7701fa70bf6a183fc8a2c33dd1d1672fb2"
+
 [package.extras]
 certs = ["certifi (==2016.9.26)"]
 ssl = ["wincertstore (==0.2)"]
@@ -92,6 +156,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "six-1.11.0-py2.py3-none-any.whl"
+hash = "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
+
+[[package.files]]
+file = "six-1.11.0.tar.gz"
+hash = "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
+
 [metadata]
 python-versions = "*"
 lock-version = "1.1"
diff --git a/tests/installation/fixtures/with-python-versions.test b/tests/installation/fixtures/with-python-versions.test
index 04ea98bc79a..feb0880ded9 100644
--- a/tests/installation/fixtures/with-python-versions.test
+++ b/tests/installation/fixtures/with-python-versions.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "B"
@@ -13,6 +14,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "C"
@@ -21,6 +23,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "~2.7 || ^3.3"
+files = []
 
 [metadata]
 python-versions = "~2.7 || ^3.4"
diff --git a/tests/installation/fixtures/with-same-version-url-dependencies.test b/tests/installation/fixtures/with-same-version-url-dependencies.test
index aec9fefa911..e7e0e8e9f8c 100644
--- a/tests/installation/fixtures/with-same-version-url-dependencies.test
+++ b/tests/installation/fixtures/with-same-version-url-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+files = []
 
 [package.source]
 type = "url"
@@ -24,6 +25,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+files = []
 
 [package.source]
 type = "url"
@@ -43,6 +45,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-sub-dependencies.test b/tests/installation/fixtures/with-sub-dependencies.test
index 35b133dfb57..74eda1a856a 100644
--- a/tests/installation/fixtures/with-sub-dependencies.test
+++ b/tests/installation/fixtures/with-sub-dependencies.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 D = "^1.0"
@@ -16,6 +17,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 C = "~1.2"
@@ -27,6 +29,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "D"
@@ -35,6 +38,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-url-dependency.test b/tests/installation/fixtures/with-url-dependency.test
index 2d23f7981aa..0d883fcfd3b 100644
--- a/tests/installation/fixtures/with-url-dependency.test
+++ b/tests/installation/fixtures/with-url-dependency.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+files = []
 
 [package.source]
 type = "url"
@@ -24,6 +25,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-vcs-dependency-with-extras.test b/tests/installation/fixtures/with-vcs-dependency-with-extras.test
index f64ba8e867e..cc87dd5e970 100644
--- a/tests/installation/fixtures/with-vcs-dependency-with-extras.test
+++ b/tests/installation/fixtures/with-vcs-dependency-with-extras.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 develop = false
 
 [package.dependencies]
@@ -27,6 +28,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "cleo"
@@ -35,6 +37,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-vcs-dependency-without-ref.test b/tests/installation/fixtures/with-vcs-dependency-without-ref.test
index 16521bdea50..efc98787771 100644
--- a/tests/installation/fixtures/with-vcs-dependency-without-ref.test
+++ b/tests/installation/fixtures/with-vcs-dependency-without-ref.test
@@ -5,6 +5,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 develop = false
 
 [package.dependencies]
@@ -23,6 +24,7 @@ description = ""
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 python-versions = "*"
diff --git a/tests/installation/fixtures/with-wheel-dependency-no-requires-dist.test b/tests/installation/fixtures/with-wheel-dependency-no-requires-dist.test
index 383e43803eb..d0fc1fb14ac 100644
--- a/tests/installation/fixtures/with-wheel-dependency-no-requires-dist.test
+++ b/tests/installation/fixtures/with-wheel-dependency-no-requires-dist.test
@@ -6,6 +6,10 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package.files]]
+file = "demo-0.1.0-py2.py3-none-any.whl"
+hash = "sha256:c25eb81459126848a1788eb3520d1a32014eb51ce3d3bae88c56bfdde4ce02db"
+
 [package.source]
 type = "file"
 url = "tests/fixtures/wheel_with_no_requires_dist/demo-0.1.0-py2.py3-none-any.whl"
diff --git a/tests/packages/test_locker.py b/tests/packages/test_locker.py
index 98dbe3a710e..74b062123ef 100644
--- a/tests/packages/test_locker.py
+++ b/tests/packages/test_locker.py
@@ -102,6 +102,14 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "bar"
+hash = "123"
+
+[[package.files]]
+file = "foo"
+hash = "456"
+
 [package.dependencies]
 B = "^1.0"
 
@@ -113,6 +121,10 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 optional = false
 python-versions = "*"
 
+[[package.files]]
+file = "baz"
+hash = "345"
+
 [[package]]
 name = "B"
 version = "1.2"
@@ -120,6 +132,7 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [[package]]
 name = "git-package"
@@ -128,6 +141,7 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 develop = false
 
 [package.source]
@@ -143,6 +157,7 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 develop = false
 
 [package.source]
@@ -159,6 +174,7 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.source]
 type = "url"
@@ -171,6 +187,7 @@ def test_lock_file_data_is_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.source]
 type = "url"
@@ -539,6 +556,7 @@ def test_lock_packages_with_null_description(locker: Locker, root: ProjectPackag
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [metadata]
 lock-version = "1.1"
@@ -570,6 +588,7 @@ def test_lock_file_should_not_have_mixed_types(locker: Locker, root: ProjectPack
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = [
@@ -651,6 +670,7 @@ def test_locking_legacy_repository_package_should_include_source_section(
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.source]
 type = "legacy"
@@ -737,6 +757,7 @@ def test_extras_dependencies_are_ordered(locker: Locker, root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = {version = "^1.0.0", extras = ["a", "b", "c"], optional = true}
@@ -827,6 +848,7 @@ def test_locker_dumps_dependency_information_correctly(
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.dependencies]
 B = {path = "project_with_extras", develop = true}
@@ -871,6 +893,7 @@ def test_locker_dumps_subdir(locker: Locker, root: ProjectPackage) -> None:
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 develop = false
 
 [package.source]
@@ -920,6 +943,7 @@ def test_locker_dumps_dependency_extras_in_correct_order(
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.extras]
 B = ["first (==1.0.0)", "second (==1.0.0)", "third (==1.0.0)"]
@@ -1088,6 +1112,7 @@ def test_lock_file_resolves_file_url_symlinks(root: ProjectPackage):
 category = "main"
 optional = false
 python-versions = "*"
+files = []
 
 [package.source]
 type = "file"