diff --git a/poetry.lock b/poetry.lock
index 9e2466ffb3c..dd00e3385b6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -60,7 +60,7 @@ msgpack = ["msgpack-python (>=0.5,<0.6)"]
 
 [[package]]
 name = "certifi"
-version = "2020.11.8"
+version = "2020.12.5"
 description = "Python package for providing Mozilla's CA Bundle."
 category = "main"
 optional = false
@@ -68,7 +68,7 @@ python-versions = "*"
 
 [[package]]
 name = "cffi"
-version = "1.14.3"
+version = "1.14.5"
 description = "Foreign Function Interface for Python calling C code."
 category = "main"
 optional = false
@@ -87,15 +87,15 @@ python-versions = ">=3.6.1"
 
 [[package]]
 name = "chardet"
-version = "3.0.4"
+version = "4.0.0"
 description = "Universal encoding detector for Python 2 and 3"
 category = "main"
 optional = false
-python-versions = "*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "cleo"
-version = "1.0.0a1"
+version = "1.0.0a3"
 description = "Cleo allows you to create beautiful and testable command-line interfaces."
 category = "main"
 optional = false
@@ -115,7 +115,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "5.3"
+version = "5.5"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -134,22 +134,36 @@ python-versions = ">=3.6,<4.0"
 
 [[package]]
 name = "cryptography"
-version = "3.2.1"
+version = "3.4.6"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 category = "main"
 optional = false
-python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-cffi = ">=1.8,<1.11.3 || >1.11.3"
-six = ">=1.4.1"
+cffi = ">=1.12"
 
 [package.extras]
 docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
 docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
 pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
 ssh = ["bcrypt (>=3.1.5)"]
-test = ["pytest (>=3.6.0,!=3.9.0,!=3.9.1,!=3.9.2)", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+test = ["pytest (>=6.0)", "pytest-cov", "pytest-subtests", "pytest-xdist", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+
+[[package]]
+name = "deepdiff"
+version = "5.2.3"
+description = "Deep Difference and Search of any Python object/data."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+ordered-set = "4.0.2"
+
+[package.extras]
+cli = ["click (==7.1.2)", "pyyaml (==5.3.1)", "toml (==0.10.2)", "clevercsv (==0.6.6)"]
 
 [[package]]
 name = "distlib"
@@ -187,7 +201,7 @@ lxml = ["lxml"]
 
 [[package]]
 name = "httpretty"
-version = "1.0.2"
+version = "1.0.5"
 description = "HTTP client mock for Python"
 category = "dev"
 optional = false
@@ -195,14 +209,14 @@ python-versions = ">=3"
 
 [[package]]
 name = "identify"
-version = "1.5.10"
+version = "2.2.0"
 description = "File identification library for Python"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+python-versions = ">=3.6.1"
 
 [package.extras]
-license = ["editdistance"]
+license = ["editdistance-s"]
 
 [[package]]
 name = "idna"
@@ -229,17 +243,18 @@ testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "importlib-resources"
-version = "3.3.0"
+version = "5.1.2"
 description = "Read resources from Python packages"
 category = "main"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
 zipp = {version = ">=0.4", markers = "python_version < \"3.8\""}
 
 [package.extras]
-docs = ["sphinx", "rst.linker", "jaraco.packaging"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [[package]]
 name = "jeepney"
@@ -254,7 +269,7 @@ test = ["pytest", "pytest-trio", "pytest-asyncio", "testpath", "trio"]
 
 [[package]]
 name = "keyring"
-version = "21.5.0"
+version = "21.8.0"
 description = "Store and access your passwords safely."
 category = "main"
 optional = false
@@ -267,7 +282,7 @@ pywin32-ctypes = {version = "<0.1.0 || >0.1.0,<0.1.1 || >0.1.1", markers = "sys_
 SecretStorage = {version = ">=3.2", markers = "sys_platform == \"linux\""}
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [[package]]
@@ -280,7 +295,7 @@ python-versions = "*"
 
 [[package]]
 name = "more-itertools"
-version = "8.6.0"
+version = "8.7.0"
 description = "More routines for operating on iterables, beyond itertools"
 category = "dev"
 optional = false
@@ -288,7 +303,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "msgpack"
-version = "1.0.0"
+version = "1.0.2"
 description = "MessagePack (de)serializer."
 category = "main"
 optional = false
@@ -302,9 +317,17 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "ordered-set"
+version = "4.0.2"
+description = "A set that remembers its order, and allows looking up its items by their index in that order."
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
 [[package]]
 name = "packaging"
-version = "20.4"
+version = "20.9"
 description = "Core utilities for Python packages"
 category = "main"
 optional = false
@@ -312,7 +335,6 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
-six = "*"
 
 [[package]]
 name = "pexpect"
@@ -327,7 +349,7 @@ ptyprocess = ">=0.5"
 
 [[package]]
 name = "pkginfo"
-version = "1.6.1"
+version = "1.7.0"
 description = "Query metadatdata from sdists / bdists / installed packages."
 category = "main"
 optional = false
@@ -370,7 +392,7 @@ resolved_reference = "5d5251c427aacedcf54f9743635a8124e5a26151"
 
 [[package]]
 name = "pre-commit"
-version = "2.9.0"
+version = "2.11.1"
 description = "A framework for managing and maintaining multi-language pre-commit hooks."
 category = "dev"
 optional = false
@@ -388,7 +410,7 @@ virtualenv = ">=20.0.8"
 
 [[package]]
 name = "ptyprocess"
-version = "0.6.0"
+version = "0.7.0"
 description = "Run a subprocess in a pseudo terminal"
 category = "main"
 optional = false
@@ -396,7 +418,7 @@ python-versions = "*"
 
 [[package]]
 name = "py"
-version = "1.9.0"
+version = "1.10.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 category = "dev"
 optional = false
@@ -451,14 +473,14 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-cov"
-version = "2.10.1"
+version = "2.11.1"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-coverage = ">=4.4"
+coverage = ">=5.2.1"
 pytest = ">=4.6"
 
 [package.extras]
@@ -501,15 +523,15 @@ python-versions = "*"
 
 [[package]]
 name = "pyyaml"
-version = "5.3.1"
+version = "5.4.1"
 description = "YAML parser and emitter for Python"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "requests"
-version = "2.25.0"
+version = "2.25.1"
 description = "Python HTTP for Humans."
 category = "main"
 optional = false
@@ -517,7 +539,7 @@ 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"
+chardet = ">=3.0.2,<5"
 idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.27"
 
@@ -538,19 +560,19 @@ requests = ">=2.0.1,<3.0.0"
 
 [[package]]
 name = "secretstorage"
-version = "3.2.0"
+version = "3.3.1"
 description = "Python bindings to FreeDesktop.org Secret Service API"
 category = "main"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [package.dependencies]
 cryptography = ">=2.0"
-jeepney = ">=0.4.2"
+jeepney = ">=0.6"
 
 [[package]]
 name = "shellingham"
-version = "1.3.2"
+version = "1.4.0"
 description = "Tool to Detect Surrounding Shell"
 category = "main"
 optional = false
@@ -590,7 +612,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "tox"
-version = "3.20.1"
+version = "3.23.0"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
@@ -599,7 +621,7 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 [package.dependencies]
 colorama = {version = ">=0.4.1", markers = "platform_system == \"Windows\""}
 filelock = ">=3.0.0"
-importlib-metadata = {version = ">=0.12,<3", markers = "python_version < \"3.8\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 packaging = ">=14"
 pluggy = ">=0.12.0"
 py = ">=1.4.17"
@@ -609,7 +631,7 @@ virtualenv = ">=16.0.0,<20.0.0 || >20.0.0,<20.0.1 || >20.0.1,<20.0.2 || >20.0.2,
 
 [package.extras]
 docs = ["pygments-github-lexers (>=0.0.5)", "sphinx (>=2.0.0)", "sphinxcontrib-autoprogram (>=0.1.5)", "towncrier (>=18.5.0)"]
-testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "pathlib2 (>=2.3.3)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "pytest-xdist (>=1.22.2)"]
+testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "pytest-xdist (>=1.22.2)", "pathlib2 (>=2.3.3)"]
 
 [[package]]
 name = "urllib3"
@@ -626,7 +648,7 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
 name = "virtualenv"
-version = "20.2.1"
+version = "20.4.3"
 description = "Virtual Python Environment builder"
 category = "main"
 optional = false
@@ -642,7 +664,7 @@ six = ">=1.9.0,<2"
 
 [package.extras]
 docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)"]
-testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "pytest-xdist (>=1.31.0)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
+testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
 
 [[package]]
 name = "wcwidth"
@@ -662,20 +684,20 @@ python-versions = "*"
 
 [[package]]
 name = "zipp"
-version = "3.4.0"
+version = "3.4.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
 python-versions = ">=3.6"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "0039f039cc6768e38203b79e8aee64fa11a96b781da515b68587b90c97ed048a"
+content-hash = "fa762bec451ef26021b1882a6f657ca2c0b3eeff514e28f805dfa7dfc1a02495"
 
 [metadata.files]
 appdirs = [
@@ -699,126 +721,139 @@ cachy = [
     {file = "cachy-0.3.0.tar.gz", hash = "sha256:186581f4ceb42a0bbe040c407da73c14092379b1e4c0e327fdb72ae4a9b269b1"},
 ]
 certifi = [
-    {file = "certifi-2020.11.8-py2.py3-none-any.whl", hash = "sha256:1f422849db327d534e3d0c5f02a263458c3955ec0aae4ff09b95f195c59f4edd"},
-    {file = "certifi-2020.11.8.tar.gz", hash = "sha256:f05def092c44fbf25834a51509ef6e631dc19765ab8a57b4e7ab85531f0a9cf4"},
+    {file = "certifi-2020.12.5-py2.py3-none-any.whl", hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"},
+    {file = "certifi-2020.12.5.tar.gz", hash = "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c"},
 ]
 cffi = [
-    {file = "cffi-1.14.3-2-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:3eeeb0405fd145e714f7633a5173318bd88d8bbfc3dd0a5751f8c4f70ae629bc"},
-    {file = "cffi-1.14.3-2-cp35-cp35m-macosx_10_9_x86_64.whl", hash = "sha256:cb763ceceae04803adcc4e2d80d611ef201c73da32d8f2722e9d0ab0c7f10768"},
-    {file = "cffi-1.14.3-2-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:44f60519595eaca110f248e5017363d751b12782a6f2bd6a7041cba275215f5d"},
-    {file = "cffi-1.14.3-2-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:c53af463f4a40de78c58b8b2710ade243c81cbca641e34debf3396a9640d6ec1"},
-    {file = "cffi-1.14.3-2-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:33c6cdc071ba5cd6d96769c8969a0531be2d08c2628a0143a10a7dcffa9719ca"},
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+    {file = "PyYAML-5.4.1-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:5accb17103e43963b80e6f837831f38d314a0495500067cb25afab2e8d7a4018"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:e1d4970ea66be07ae37a3c2e48b5ec63f7ba6804bdddfdbd3cfd954d25a82e63"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-win32.whl", hash = "sha256:dd5de0646207f053eb0d6c74ae45ba98c3395a571a2891858e87df7c9b9bd51b"},
+    {file = "PyYAML-5.4.1-cp37-cp37m-win_amd64.whl", hash = "sha256:08682f6b72c722394747bddaf0aa62277e02557c0fd1c42cb853016a38f8dedf"},
+    {file = "PyYAML-5.4.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:d2d9808ea7b4af864f35ea216be506ecec180628aced0704e34aca0b040ffe46"},
+    {file = "PyYAML-5.4.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:8c1be557ee92a20f184922c7b6424e8ab6691788e6d86137c5d93c1a6ec1b8fb"},
+    {file = "PyYAML-5.4.1-cp38-cp38-win32.whl", hash = "sha256:fa5ae20527d8e831e8230cbffd9f8fe952815b2b7dae6ffec25318803a7528fc"},
+    {file = "PyYAML-5.4.1-cp38-cp38-win_amd64.whl", hash = "sha256:0f5f5786c0e09baddcd8b4b45f20a7b5d61a7e7e99846e3c799b05c7c53fa696"},
+    {file = "PyYAML-5.4.1-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:294db365efa064d00b8d1ef65d8ea2c3426ac366c0c4368d930bf1c5fb497f77"},
+    {file = "PyYAML-5.4.1-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:74c1485f7707cf707a7aef42ef6322b8f97921bd89be2ab6317fd782c2d53183"},
+    {file = "PyYAML-5.4.1-cp39-cp39-win32.whl", hash = "sha256:49d4cdd9065b9b6e206d0595fee27a96b5dd22618e7520c33204a4a3239d5b10"},
+    {file = "PyYAML-5.4.1-cp39-cp39-win_amd64.whl", hash = "sha256:c20cfa2d49991c8b4147af39859b167664f2ad4561704ee74c1de03318e898db"},
+    {file = "PyYAML-5.4.1.tar.gz", hash = "sha256:607774cbba28732bfa802b54baa7484215f530991055bb562efbed5b2f20a45e"},
 ]
 requests = [
-    {file = "requests-2.25.0-py2.py3-none-any.whl", hash = "sha256:e786fa28d8c9154e6a4de5d46a1d921b8749f8b74e28bde23768e5e16eece998"},
-    {file = "requests-2.25.0.tar.gz", hash = "sha256:7f1a0b932f4a60a1a65caa4263921bb7d9ee911957e0ae4a23a6dd08185ad5f8"},
+    {file = "requests-2.25.1-py2.py3-none-any.whl", hash = "sha256:c210084e36a42ae6b9219e00e48287def368a26d03a048ddad7bfee44f75871e"},
+    {file = "requests-2.25.1.tar.gz", hash = "sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804"},
 ]
 requests-toolbelt = [
     {file = "requests-toolbelt-0.9.1.tar.gz", hash = "sha256:968089d4584ad4ad7c171454f0a5c6dac23971e9472521ea3b6d49d610aa6fc0"},
     {file = "requests_toolbelt-0.9.1-py2.py3-none-any.whl", hash = "sha256:380606e1d10dc85c3bd47bf5a6095f815ec007be7a8b69c878507068df059e6f"},
 ]
 secretstorage = [
-    {file = "SecretStorage-3.2.0-py3-none-any.whl", hash = "sha256:ed5279d788af258e4676fa26b6efb6d335a31f1f9f529b6f1e200f388fac33e1"},
-    {file = "SecretStorage-3.2.0.tar.gz", hash = "sha256:46305c3847ee3f7252b284e0eee5590fa6341c891104a2fd2313f8798c615a82"},
+    {file = "SecretStorage-3.3.1-py3-none-any.whl", hash = "sha256:422d82c36172d88d6a0ed5afdec956514b189ddbfb72fefab0c8a1cee4eaf71f"},
+    {file = "SecretStorage-3.3.1.tar.gz", hash = "sha256:fd666c51a6bf200643495a04abb261f83229dcb6fd8472ec393df7ffc8b6f195"},
 ]
 shellingham = [
-    {file = "shellingham-1.3.2-py2.py3-none-any.whl", hash = "sha256:7f6206ae169dc1a03af8a138681b3f962ae61cc93ade84d0585cca3aaf770044"},
-    {file = "shellingham-1.3.2.tar.gz", hash = "sha256:576c1982bea0ba82fb46c36feb951319d7f42214a82634233f58b40d858a751e"},
+    {file = "shellingham-1.4.0-py2.py3-none-any.whl", hash = "sha256:536b67a0697f2e4af32ab176c00a50ac2899c5a05e0d8e2dadac8e58888283f9"},
+    {file = "shellingham-1.4.0.tar.gz", hash = "sha256:4855c2458d6904829bd34c299f11fdeed7cfefbf8a2c522e4caea6cd76b3171e"},
 ]
 six = [
     {file = "six-1.15.0-py2.py3-none-any.whl", hash = "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"},
@@ -996,16 +1054,16 @@ tomlkit = [
     {file = "tomlkit-0.7.0.tar.gz", hash = "sha256:ac57f29693fab3e309ea789252fcce3061e19110085aa31af5446ca749325618"},
 ]
 tox = [
-    {file = "tox-3.20.1-py2.py3-none-any.whl", hash = "sha256:42ce19ce5dc2f6d6b1fdc5666c476e1f1e2897359b47e0aa3a5b774f335d57c2"},
-    {file = "tox-3.20.1.tar.gz", hash = "sha256:4321052bfe28f9d85082341ca8e233e3ea901fdd14dab8a5d3fbd810269fbaf6"},
+    {file = "tox-3.23.0-py2.py3-none-any.whl", hash = "sha256:e007673f3595cede9b17a7c4962389e4305d4a3682a6c5a4159a1453b4f326aa"},
+    {file = "tox-3.23.0.tar.gz", hash = "sha256:05a4dbd5e4d3d8269b72b55600f0b0303e2eb47ad5c6fe76d3576f4c58d93661"},
 ]
 urllib3 = [
     {file = "urllib3-1.25.10-py2.py3-none-any.whl", hash = "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"},
     {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
 ]
 virtualenv = [
-    {file = "virtualenv-20.2.1-py2.py3-none-any.whl", hash = "sha256:07cff122e9d343140366055f31be4dcd61fd598c69d11cd33a9d9c8df4546dd7"},
-    {file = "virtualenv-20.2.1.tar.gz", hash = "sha256:e0aac7525e880a429764cefd3aaaff54afb5d9f25c82627563603f5d7de5a6e5"},
+    {file = "virtualenv-20.4.3-py2.py3-none-any.whl", hash = "sha256:83f95875d382c7abafe06bd2a4cdd1b363e1bb77e02f155ebe8ac082a916b37c"},
+    {file = "virtualenv-20.4.3.tar.gz", hash = "sha256:49ec4eb4c224c6f7dd81bb6d0a28a09ecae5894f4e593c89b0db0885f565a107"},
 ]
 wcwidth = [
     {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},
@@ -1016,6 +1074,6 @@ webencodings = [
     {file = "webencodings-0.5.1.tar.gz", hash = "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"},
 ]
 zipp = [
-    {file = "zipp-3.4.0-py3-none-any.whl", hash = "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108"},
-    {file = "zipp-3.4.0.tar.gz", hash = "sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb"},
+    {file = "zipp-3.4.1-py3-none-any.whl", hash = "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"},
+    {file = "zipp-3.4.1.tar.gz", hash = "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76"},
 ]
diff --git a/poetry/inspection/info.py b/poetry/inspection/info.py
index 4ccaf429d6d..12e143c6370 100644
--- a/poetry/inspection/info.py
+++ b/poetry/inspection/info.py
@@ -22,8 +22,7 @@
 from poetry.core.utils.helpers import temporary_directory
 from poetry.core.version.markers import InvalidMarker
 from poetry.utils.env import EnvCommandError
-from poetry.utils.env import EnvManager
-from poetry.utils.env import VirtualEnv
+from poetry.utils.env import ephemeral_environment
 from poetry.utils.setup_reader import SetupReader
 
 
@@ -451,20 +450,13 @@ def _pep517_metadata(cls, path: Path) -> "PackageInfo":
         except PackageInfoError:
             pass
 
-        with temporary_directory() as tmp_dir:
+        with ephemeral_environment(pip=True, wheel=True, setuptools=True) as venv:
             # TODO: cache PEP 517 build environment corresponding to each project venv
-            venv_dir = Path(tmp_dir) / ".venv"
-            EnvManager.build_venv(venv_dir.as_posix())
-            venv = VirtualEnv(venv_dir, venv_dir)
-
-            dest_dir = Path(tmp_dir) / "dist"
+            dest_dir = venv.path.parent / "dist"
             dest_dir.mkdir()
 
             try:
-                venv.run(
-                    "python",
-                    "-m",
-                    "pip",
+                venv.run_pip(
                     "install",
                     "--disable-pip-version-check",
                     "--ignore-installed",
diff --git a/poetry/installation/executor.py b/poetry/installation/executor.py
index ea2940e1fbd..b2d85e566a6 100644
--- a/poetry/installation/executor.py
+++ b/poetry/installation/executor.py
@@ -22,7 +22,9 @@
 from poetry.utils._compat import decode
 from poetry.utils.env import EnvCommandError
 from poetry.utils.helpers import safe_rmtree
+from poetry.utils.pip import pip_editable_install
 
+from ..utils.pip import pip_install
 from .authenticator import Authenticator
 from .chef import Chef
 from .chooser import Chooser
@@ -474,12 +476,9 @@ def _install(self, operation: Union[Install, Update]) -> int:
             )
         )
         self._write(operation, message)
-
-        args = ["install", "--no-deps", str(archive)]
-        if operation.job_type == "update":
-            args.insert(2, "-U")
-
-        return self.run_pip(*args)
+        return pip_install(
+            str(archive), self._env, upgrade=operation.job_type == "update"
+        )
 
     def _update(self, operation: Union[Install, Update]) -> int:
         return self._install(operation)
@@ -533,11 +532,9 @@ def _install_directory(self, operation: Union[Install, Update]) -> int:
         self._write(operation, message)
 
         if package.root_dir:
-            req = os.path.join(str(package.root_dir), package.source_url)
+            req = package.root_dir / package.source_url
         else:
-            req = os.path.realpath(package.source_url)
-
-        args = ["install", "--no-deps", "-U"]
+            req = Path(package.source_url).resolve(strict=False)
 
         pyproject = PyProjectTOML(os.path.join(req, "pyproject.toml"))
 
@@ -572,18 +569,13 @@ def _install_directory(self, operation: Union[Install, Update]) -> int:
 
                 with builder.setup_py():
                     if package.develop:
-                        args.append("-e")
-
-                    args.append(req)
-
-                    return self.run_pip(*args)
+                        return pip_editable_install(req, self._env)
+                    return pip_install(req, self._env, upgrade=True)
 
         if package.develop:
-            args.append("-e")
-
-        args.append(req)
+            return pip_editable_install(req, self._env)
 
-        return self.run_pip(*args)
+        return pip_install(req, self._env, upgrade=True)
 
     def _install_git(self, operation: Union[Install, Update]) -> int:
         from poetry.core.vcs import Git
diff --git a/poetry/installation/pip_installer.py b/poetry/installation/pip_installer.py
index 094fe23825b..bf253367fc3 100644
--- a/poetry/installation/pip_installer.py
+++ b/poetry/installation/pip_installer.py
@@ -2,6 +2,7 @@
 import tempfile
 import urllib.parse
 
+from pathlib import Path
 from subprocess import CalledProcessError
 from typing import TYPE_CHECKING
 from typing import Any
@@ -10,12 +11,13 @@
 from cleo.io.io import IO
 
 from poetry.core.pyproject.toml import PyProjectTOML
+from poetry.installation.base_installer import BaseInstaller
 from poetry.repositories.pool import Pool
 from poetry.utils._compat import encode
 from poetry.utils.env import Env
 from poetry.utils.helpers import safe_rmtree
-
-from .base_installer import BaseInstaller
+from poetry.utils.pip import pip_editable_install
+from poetry.utils.pip import pip_install
 
 
 if TYPE_CHECKING:
@@ -188,12 +190,12 @@ def install_directory(self, package: "Package") -> Union[str, int]:
 
         from poetry.factory import Factory
 
+        req: Path
+
         if package.root_dir:
             req = (package.root_dir / package.source_url).as_posix()
         else:
-            req = os.path.realpath(package.source_url)
-
-        args = ["install", "--no-deps", "-U"]
+            req = Path(package.source_url).resolve(strict=False)
 
         pyproject = PyProjectTOML(os.path.join(req, "pyproject.toml"))
 
@@ -228,18 +230,16 @@ def install_directory(self, package: "Package") -> Union[str, int]:
 
                 with builder.setup_py():
                     if package.develop:
-                        args.append("-e")
-
-                    args.append(req)
-
-                    return self.run(*args)
+                        return pip_editable_install(
+                            directory=req, environment=self._env
+                        )
+                    return pip_install(
+                        path=req, environment=self._env, deps=False, upgrade=True
+                    )
 
         if package.develop:
-            args.append("-e")
-
-        args.append(req)
-
-        return self.run(*args)
+            return pip_editable_install(directory=req, environment=self._env)
+        return pip_install(path=req, environment=self._env, deps=False, upgrade=True)
 
     def install_git(self, package: "Package") -> None:
         from poetry.core.packages.package import Package
diff --git a/poetry/masonry/builders/editable.py b/poetry/masonry/builders/editable.py
index 07f59d0b311..c8b83959a43 100644
--- a/poetry/masonry/builders/editable.py
+++ b/poetry/masonry/builders/editable.py
@@ -16,6 +16,7 @@
 from poetry.utils._compat import WINDOWS
 from poetry.utils._compat import decode
 from poetry.utils.helpers import is_dir_writable
+from poetry.utils.pip import pip_editable_install
 
 
 if TYPE_CHECKING:
@@ -56,7 +57,6 @@ def build(self) -> None:
                 self._debug(
                     "  - <warning>Falling back on using a <b>setup.py</b></warning>"
                 )
-
                 return self._setup_build()
 
             self._run_build_script(self._package.build_script)
@@ -85,14 +85,14 @@ def _setup_build(self) -> None:
 
         try:
             if self._env.pip_version < Version(19, 0):
-                self._env.run_pip("install", "-e", str(self._path), "--no-deps")
+                pip_editable_install(self._path, self._env)
             else:
                 # Temporarily rename pyproject.toml
                 shutil.move(
                     str(self._poetry.file), str(self._poetry.file.with_suffix(".tmp"))
                 )
                 try:
-                    self._env.run_pip("install", "-e", str(self._path), "--no-deps")
+                    pip_editable_install(self._path, self._env)
                 finally:
                     shutil.move(
                         str(self._poetry.file.with_suffix(".tmp")),
diff --git a/poetry/puzzle/provider.py b/poetry/puzzle/provider.py
index d7576bb7a23..f18a56e0579 100644
--- a/poetry/puzzle/provider.py
+++ b/poetry/puzzle/provider.py
@@ -54,7 +54,7 @@ def _formatter_elapsed(self) -> str:
 
 class Provider:
 
-    UNSAFE_PACKAGES = {"setuptools", "distribute", "pip", "wheel"}
+    UNSAFE_PACKAGES = set()
 
     def __init__(
         self, package: Package, pool: Pool, io: Any, env: Optional[Env] = None
diff --git a/poetry/utils/env.py b/poetry/utils/env.py
index cd1b2c3c8ea..a4588617d1e 100644
--- a/poetry/utils/env.py
+++ b/poetry/utils/env.py
@@ -14,6 +14,7 @@
 from pathlib import Path
 from subprocess import CalledProcessError
 from typing import Any
+from typing import ContextManager
 from typing import Dict
 from typing import Iterator
 from typing import List
@@ -30,6 +31,7 @@
 from packaging.tags import interpreter_name
 from packaging.tags import interpreter_version
 from packaging.tags import sys_tags
+from virtualenv.seed.wheels.embed import get_embed_wheel
 
 from poetry.core.semver.helpers import parse_constraint
 from poetry.core.semver.version import Version
@@ -42,6 +44,7 @@
 from poetry.utils._compat import list_to_shell_command
 from poetry.utils.helpers import is_dir_writable
 from poetry.utils.helpers import paths_csv
+from poetry.utils.helpers import temporary_directory
 
 
 GET_ENVIRONMENT_INFO = """\
@@ -810,6 +813,9 @@ def build_venv(
         path: Union[Path, str],
         executable: Optional[Union[str, Path]] = None,
         flags: Dict[str, bool] = None,
+        with_pip: bool = False,
+        with_wheel: Optional[bool] = None,
+        with_setuptools: Optional[bool] = None,
     ) -> virtualenv.run.session.Session:
         flags = flags or {}
 
@@ -821,12 +827,27 @@ def build_venv(
             "--no-periodic-update",
             "--python",
             executable or sys.executable,
-            str(path),
         ]
 
+        if not with_pip:
+            args.append("--no-pip")
+        else:
+            if with_wheel is None:
+                # we want wheels to be enabled when pip is required and it has
+                # not been explicitly disabled
+                with_wheel = True
+
+        if with_wheel is None or not with_wheel:
+            args.append("--no-wheel")
+
+        if with_setuptools is None or not with_setuptools:
+            args.append("--no-setuptools")
+
         for flag, value in flags.items():
             if value is True:
-                args.insert(0, "--{}".format(flag))
+                args.append("--{}".format(flag))
+
+        args.append(str(path))
 
         return virtualenv.cli_run(args)
 
@@ -929,12 +950,21 @@ def marker_env(self) -> Dict[str, Any]:
 
         return self._marker_env
 
+    def get_embedded_wheel(self, distribution):
+        return get_embed_wheel(
+            distribution, "{}.{}".format(self.version_info[0], self.version_info[1])
+        ).path
+
     @property
     def pip(self) -> str:
         """
         Path to current pip executable
         """
-        return self._bin("pip")
+        # we do not use as_posix() here due to issues with windows pathlib2 implementation
+        path = self._bin("pip")
+        if not Path(path).exists():
+            return str(self.get_embedded_wheel("pip") / "pip")
+        return path
 
     @property
     def platform(self) -> str:
@@ -1057,6 +1087,9 @@ def is_sane(self) -> bool:
         return True
 
     def run(self, bin: str, *args: str, **kwargs: Any) -> Union[str, int]:
+        if bin == "pip":
+            return self.run_pip(*args, **kwargs)
+
         bin = self._bin(bin)
         cmd = [bin] + list(args)
         return self._run(cmd, **kwargs)
@@ -1101,6 +1134,9 @@ def _run(self, cmd: List[str], **kwargs: Any) -> Union[int, str]:
         return decode(output)
 
     def execute(self, bin: str, *args: str, **kwargs: Any) -> Optional[int]:
+        if bin == "pip":
+            return self.run_pip(*args, **kwargs)
+
         bin = self._bin(bin)
 
         if not self._is_windows:
@@ -1181,7 +1217,7 @@ def get_python_implementation(self) -> str:
     def get_pip_command(self) -> List[str]:
         # If we're not in a venv, assume the interpreter we're running on
         # has a pip and use that
-        return [sys.executable, "-m", "pip"]
+        return [sys.executable, self.pip]
 
     def get_paths(self) -> Dict[str, str]:
         # We can't use sysconfig.get_paths() because
@@ -1289,7 +1325,7 @@ def get_python_implementation(self) -> str:
     def get_pip_command(self) -> List[str]:
         # We're in a virtualenv that is known to be sane,
         # so assume that we have a functional pip
-        return [self._bin("pip")]
+        return [self._bin("python"), self.pip]
 
     def get_supported_tags(self) -> List[Tag]:
         file_path = Path(packaging.tags.__file__)
@@ -1343,8 +1379,8 @@ def is_venv(self) -> bool:
         return True
 
     def is_sane(self) -> bool:
-        # A virtualenv is considered sane if both "python" and "pip" exist.
-        return os.path.exists(self.python) and os.path.exists(self._bin("pip"))
+        # A virtualenv is considered sane if "python" exists.
+        return os.path.exists(self.python)
 
     def _run(self, cmd: List[str], **kwargs: Any) -> Optional[int]:
         with self.temp_environ():
@@ -1396,7 +1432,7 @@ def __init__(
         self.executed = []
 
     def get_pip_command(self) -> List[str]:
-        return [self._bin("python"), "-m", "pip"]
+        return [self._bin("python"), self.pip]
 
     def _run(self, cmd: List[str], **kwargs: Any) -> int:
         self.executed.append(cmd)
@@ -1414,6 +1450,26 @@ def _bin(self, bin: str) -> str:
         return bin
 
 
+@contextmanager
+def ephemeral_environment(
+    executable=None,
+    pip: bool = False,
+    wheel: Optional[bool] = None,
+    setuptools: Optional[bool] = None,
+) -> ContextManager[VirtualEnv]:
+    with temporary_directory() as tmp_dir:
+        # TODO: cache PEP 517 build environment corresponding to each project venv
+        venv_dir = Path(tmp_dir) / ".venv"
+        EnvManager.build_venv(
+            path=venv_dir.as_posix(),
+            executable=executable,
+            with_pip=pip,
+            with_wheel=wheel,
+            with_setuptools=setuptools,
+        )
+        yield VirtualEnv(venv_dir, venv_dir)
+
+
 class MockEnv(NullEnv):
     def __init__(
         self,
diff --git a/poetry/utils/pip.py b/poetry/utils/pip.py
new file mode 100644
index 00000000000..1c182e46708
--- /dev/null
+++ b/poetry/utils/pip.py
@@ -0,0 +1,50 @@
+from pathlib import Path
+from typing import Union
+
+from poetry.exceptions import PoetryException
+from poetry.utils.env import Env
+from poetry.utils.env import ephemeral_environment
+
+
+def pip_install(
+    path: Union[Path, str],
+    environment: Env,
+    editable: bool = False,
+    deps: bool = False,
+    upgrade: bool = False,
+) -> Union[int, str]:
+    path = Path(path) if isinstance(path, str) else path
+
+    args = ["install", "--prefix", str(environment.path)]
+
+    if upgrade:
+        args.append("--upgrade")
+
+    if not deps:
+        args.append("--no-deps")
+
+    if editable:
+        if not path.is_dir():
+            raise PoetryException(
+                "Cannot install non directory dependencies in editable mode"
+            )
+        args.append("-e")
+
+    args.append(str(path))
+
+    if path.is_file() and path.suffix == ".whl":
+        return environment.run_pip(*args)
+
+    with ephemeral_environment(
+        executable=environment.python, pip=True, setuptools=True
+    ) as env:
+        return env.run(
+            "pip",
+            *args,
+        )
+
+
+def pip_editable_install(directory: Path, environment: Env) -> Union[int, str]:
+    return pip_install(
+        path=directory, environment=environment, editable=True, deps=False, upgrade=True
+    )
diff --git a/pyproject.toml b/pyproject.toml
index 2a59102ff77..1185634bf32 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ tox = "^3.0"
 pytest-sugar = "^0.9.2"
 httpretty = "^1.0"
 zipp = { version = "^3.4", python = "<3.8"}
+deepdiff = "^5.0.2"
 # temporary workaround for https://github.com/python-poetry/poetry/issues/3404
 urllib3 = "1.25.10"
 
diff --git a/tests/console/commands/env/helpers.py b/tests/console/commands/env/helpers.py
index 63bf00fd68b..b15a68d07a2 100644
--- a/tests/console/commands/env/helpers.py
+++ b/tests/console/commands/env/helpers.py
@@ -1,18 +1,16 @@
 from pathlib import Path
-from typing import Optional
+from typing import Any
 from typing import Union
 
 from poetry.core.semver.version import Version
 
 
-def build_venv(
-    path: Union[Path, str], executable: Optional[str] = None, flags: bool = None
-) -> ():
+def build_venv(path: Union[Path, str], **_: Any) -> ():
     Path(path).mkdir(parents=True, exist_ok=True)
 
 
 def check_output_wrapper(version=Version.parse("3.7.1")):
-    def check_output(cmd, *args, **kwargs):
+    def check_output(cmd, *_, **__):
         if "sys.version_info[:3]" in cmd:
             return version.text
         elif "sys.version_info[:2]" in cmd:
diff --git a/tests/inspection/test_info.py b/tests/inspection/test_info.py
index 3a15e605a6f..215109d551f 100644
--- a/tests/inspection/test_info.py
+++ b/tests/inspection/test_info.py
@@ -217,7 +217,7 @@ def test_info_setup_missing_mandatory_should_trigger_pep517(
     except PackageInfoError:
         assert spy.call_count == 3
     else:
-        assert spy.call_count == 2
+        assert spy.call_count == 1
 
 
 def test_info_prefer_poetry_config_over_egg_info():
diff --git a/tests/installation/fixtures/with-pypi-repository.test b/tests/installation/fixtures/with-pypi-repository.test
index 3f3719452d9..d1ed1ae55ed 100644
--- a/tests/installation/fixtures/with-pypi-repository.test
+++ b/tests/installation/fixtures/with-pypi-repository.test
@@ -66,6 +66,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 py = ">=1.5.0"
 six = ">=1.10.0"
 attrs = ">=17.4.0"
+setuptools = "*"
 more-itertools = ">=4.0.0"
 pluggy = ">=0.5,<0.7"
 funcsigs = {"version" = "*", "markers" = "python_version < \"3.0\""}
@@ -79,6 +80,18 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "setuptools"
+version = "39.2.0"
+description = "Easily download, build, install, upgrade, and uninstall Python packages"
+category = "dev"
+optional = false
+python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*"
+
+[package.extras]
+certs = ["certifi (==2016.9.26)"]
+ssl = ["wincertstore (==0.2)"]
+
 [metadata]
 python-versions = "*"
 lock-version = "1.1"
@@ -113,6 +126,10 @@ pytest = [
     {file = "pytest-3.5.0-py2.py3-none-any.whl", hash = "sha256:6266f87ab64692112e5477eba395cfedda53b1933ccd29478e671e73b420c19c"},
     {file = "pytest-3.5.0.tar.gz", hash = "sha256:fae491d1874f199537fd5872b5e1f0e74a009b979df9d53d1553fd03da1703e1"},
 ]
+setuptools = [
+    {file = "setuptools-39.2.0-py2.py3-none-any.whl", hash = "sha256:8fca9275c89964f13da985c3656cb00ba029d7f3916b37990927ffdf264e7926"},
+    {file = "setuptools-39.2.0.zip", hash = "sha256:f7cddbb5f5c640311eb00eab6e849f7701fa70bf6a183fc8a2c33dd1d1672fb2"},
+]
 six = [
     {file = "six-1.11.0-py2.py3-none-any.whl", hash = "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"},
     {file = "six-1.11.0.tar.gz", hash = "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"},
diff --git a/tests/installation/test_executor.py b/tests/installation/test_executor.py
index 444a8af2211..78e951e3c4d 100644
--- a/tests/installation/test_executor.py
+++ b/tests/installation/test_executor.py
@@ -13,6 +13,7 @@
 
 from poetry.config.config import Config
 from poetry.core.packages.package import Package
+from poetry.core.utils._compat import PY36
 from poetry.installation.executor import Executor
 from poetry.installation.operations import Install
 from poetry.installation.operations import Uninstall
@@ -66,8 +67,12 @@ def callback(request, uri, headers):
 
 
 def test_execute_executes_a_batch_of_operations(
-    config, pool, io, tmp_dir, mock_file_downloads, env
+    mocker, config, pool, io, tmp_dir, mock_file_downloads, env
 ):
+    pip_editable_install = mocker.patch(
+        "poetry.installation.executor.pip_editable_install", unsafe=not PY36
+    )
+
     config = Config()
     config.merge({"cache-dir": tmp_dir})
 
@@ -102,6 +107,7 @@ def test_execute_executes_a_batch_of_operations(
         source_type="git",
         source_reference="master",
         source_url="https://github.com/demo/demo.git",
+        develop=True,
     )
 
     return_code = executor.execute(
@@ -132,8 +138,9 @@ def test_execute_executes_a_batch_of_operations(
     expected = set(expected.splitlines())
     output = set(io.fetch_output().splitlines())
     assert expected == output
-    assert 6 == len(env.executed)
+    assert 4 == len(env.executed)
     assert 0 == return_code
+    pip_editable_install.assert_called_once()
 
 
 def test_execute_shows_skipped_operations_if_verbose(
diff --git a/tests/installation/test_installer.py b/tests/installation/test_installer.py
index 7cba8667a67..a671e6b4d0a 100644
--- a/tests/installation/test_installer.py
+++ b/tests/installation/test_installer.py
@@ -12,6 +12,7 @@
 from cleo.io.null_io import NullIO
 from cleo.io.outputs.buffered_output import BufferedOutput
 from cleo.io.outputs.output import Verbosity
+from deepdiff import DeepDiff
 
 from poetry.core.packages.project_package import ProjectPackage
 from poetry.core.toml.file import TOMLFile
@@ -392,15 +393,19 @@ def test_run_install_remove_untracked(installer, locker, repo, package, installe
     package_b = get_package("b", "1.1")
     package_c = get_package("c", "1.2")
     package_pip = get_package("pip", "20.0.0")
+    package_setuptools = get_package("setuptools", "20.0.0")
+
     repo.add_package(package_a)
     repo.add_package(package_b)
     repo.add_package(package_c)
     repo.add_package(package_pip)
+    repo.add_package(package_setuptools)
 
     installed.add_package(package_a)
     installed.add_package(package_b)
     installed.add_package(package_c)
-    installed.add_package(package_pip)  # Always required and never removed.
+    installed.add_package(package_pip)
+    installed.add_package(package_setuptools)
     installed.add_package(package)  # Root package never removed.
 
     package.add_dependency(Factory.create_dependency("A", "~1.0"))
@@ -410,8 +415,10 @@ def test_run_install_remove_untracked(installer, locker, repo, package, installe
 
     assert 0 == installer.executor.installations_count
     assert 0 == installer.executor.updates_count
-    assert 2 == installer.executor.removals_count
-    assert {"b", "c"} == set(r.name for r in installer.executor.removals)
+    assert 4 == installer.executor.removals_count
+    assert {"b", "c", "pip", "setuptools"} == set(
+        r.name for r in installer.executor.removals
+    )
 
 
 def test_run_whitelist_add(installer, locker, repo, package):
@@ -826,8 +833,7 @@ def test_installer_with_pypi_repository(package, locker, installed, config):
     installer.run()
 
     expected = fixture("with-pypi-repository")
-
-    assert locker.written_data == expected
+    assert not DeepDiff(expected, locker.written_data, ignore_order=True)
 
 
 def test_run_installs_with_local_file(installer, locker, repo, package, fixture_dir):
@@ -1608,7 +1614,7 @@ def test_installer_required_extras_should_not_be_removed_when_updating_single_de
     installer.whitelist(["pytest"])
     installer.run()
 
-    assert 6 == installer.executor.installations_count
+    assert 7 == installer.executor.installations_count
     assert 0 == installer.executor.updates_count
     assert 0 == installer.executor.removals_count
 
diff --git a/tests/installation/test_installer_old.py b/tests/installation/test_installer_old.py
index a9cc4879d9d..a8e7a9c1877 100644
--- a/tests/installation/test_installer_old.py
+++ b/tests/installation/test_installer_old.py
@@ -7,6 +7,7 @@
 import pytest
 
 from cleo.io.null_io import NullIO
+from deepdiff import DeepDiff
 
 from poetry.core.packages.project_package import ProjectPackage
 from poetry.core.toml.file import TOMLFile
@@ -318,15 +319,19 @@ def test_run_install_remove_untracked(installer, locker, repo, package, installe
     package_b = get_package("b", "1.1")
     package_c = get_package("c", "1.2")
     package_pip = get_package("pip", "20.0.0")
+    package_setuptools = get_package("setuptools", "20.0.0")
+
     repo.add_package(package_a)
     repo.add_package(package_b)
     repo.add_package(package_c)
     repo.add_package(package_pip)
+    repo.add_package(package_setuptools)
 
     installed.add_package(package_a)
     installed.add_package(package_b)
     installed.add_package(package_c)
-    installed.add_package(package_pip)  # Always required and never removed.
+    installed.add_package(package_pip)
+    installed.add_package(package_setuptools)
     installed.add_package(package)  # Root package never removed.
 
     package.add_dependency(Factory.create_dependency("A", "~1.0"))
@@ -341,7 +346,7 @@ def test_run_install_remove_untracked(installer, locker, repo, package, installe
     assert len(updates) == 0
 
     removals = installer.installer.removals
-    assert set(r.name for r in removals) == {"b", "c"}
+    assert set(r.name for r in removals) == {"b", "c", "pip", "setuptools"}
 
 
 def test_run_whitelist_add(installer, locker, repo, package):
@@ -733,8 +738,7 @@ def test_installer_with_pypi_repository(package, locker, installed, config):
     installer.run()
 
     expected = fixture("with-pypi-repository")
-
-    assert locker.written_data == expected
+    assert not DeepDiff(expected, locker.written_data, ignore_order=True)
 
 
 def test_run_installs_with_local_file(installer, locker, repo, package, fixture_dir):
@@ -1505,7 +1509,7 @@ def test_installer_required_extras_should_not_be_removed_when_updating_single_de
     installer.whitelist(["pytest"])
     installer.run()
 
-    assert len(installer.installer.installs) == 6
+    assert len(installer.installer.installs) == 7
     assert len(installer.installer.updates) == 0
     assert len(installer.installer.removals) == 0
 
diff --git a/tests/masonry/builders/test_editable_builder.py b/tests/masonry/builders/test_editable_builder.py
index 8e236b9b188..efe79bed772 100644
--- a/tests/masonry/builders/test_editable_builder.py
+++ b/tests/masonry/builders/test_editable_builder.py
@@ -179,24 +179,19 @@ def test_builder_installs_proper_files_for_standard_packages(simple_poetry, tmp_
 
 
 def test_builder_falls_back_on_setup_and_pip_for_packages_with_build_scripts(
-    extended_poetry, tmp_dir
+    mocker, extended_poetry, tmp_dir
 ):
+    pip_editable_install = mocker.patch(
+        "poetry.masonry.builders.editable.pip_editable_install"
+    )
     env = MockEnv(path=Path(tmp_dir) / "foo")
     builder = EditableBuilder(extended_poetry, env, NullIO())
 
     builder.build()
-
-    assert [
-        [
-            "python",
-            "-m",
-            "pip",
-            "install",
-            "-e",
-            str(extended_poetry.file.parent),
-            "--no-deps",
-        ]
-    ] == env.executed
+    pip_editable_install.assert_called_once_with(
+        extended_poetry.pyproject.file.path.parent, env
+    )
+    assert [] == env.executed
 
 
 def test_builder_installs_proper_files_when_packages_configured(
diff --git a/tests/puzzle/test_solver.py b/tests/puzzle/test_solver.py
index 9b4b9a7a0a8..37693b6333e 100644
--- a/tests/puzzle/test_solver.py
+++ b/tests/puzzle/test_solver.py
@@ -2403,11 +2403,12 @@ def test_solver_remove_untracked_single(package, pool, installed, locked, io):
     check_solver_result(ops, [{"job": "remove", "package": package_a}])
 
 
+@pytest.mark.skip(reason="Poetry no longer has critical package requirements")
 def test_solver_remove_untracked_keeps_critical_package(
     package, pool, installed, locked, io
 ):
     solver = Solver(package, pool, installed, locked, io, remove_untracked=True)
-    package_pip = get_package("pip", "1.0")
+    package_pip = get_package("setuptools", "1.0")
     installed.add_package(package_pip)
 
     ops = solver.solve()