diff --git a/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/METADATA b/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/METADATA
new file mode 100644
index 00000000000..551158eb9ba
--- /dev/null
+++ b/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/METADATA
@@ -0,0 +1,6 @@
+Metadata-Version: 2.1
+Name: git-pep-610-subdirectory
+Version: 1.2.3
+Summary: Foo
+License: MIT
+Requires-Python: >=3.6
diff --git a/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/direct_url.json b/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/direct_url.json
new file mode 100644
index 00000000000..6b6c93ab265
--- /dev/null
+++ b/tests/repositories/fixtures/installed/lib/python3.7/site-packages/git_pep_610_subdirectory-1.2.3.dist-info/direct_url.json
@@ -0,0 +1,9 @@
+{
+  "url": "https://github.com/demo/git-pep-610-subdirectory.git",
+  "vcs_info": {
+    "vcs": "git",
+    "requested_revision": "my-branch",
+    "commit_id": "123456"
+  },
+  "subdirectory": "subdir"
+}
diff --git a/tests/repositories/test_installed_repository.py b/tests/repositories/test_installed_repository.py
index 599c432e858..87dfe183c8a 100644
--- a/tests/repositories/test_installed_repository.py
+++ b/tests/repositories/test_installed_repository.py
@@ -39,6 +39,9 @@
     metadata.PathDistribution(
         SITE_PURELIB / "git_pep_610_no_requested_version-1.2.3.dist-info"
     ),
+    metadata.PathDistribution(
+        SITE_PURELIB / "git_pep_610_subdirectory-1.2.3.dist-info"
+    ),
     metadata.PathDistribution(SITE_PURELIB / "url_pep_610-1.2.3.dist-info"),
     metadata.PathDistribution(SITE_PURELIB / "file_pep_610-1.2.3.dist-info"),
     metadata.PathDistribution(SITE_PURELIB / "directory_pep_610-1.2.3.dist-info"),
@@ -238,6 +241,20 @@ def test_load_pep_610_compliant_git_packages_no_requested_version(
     assert package.source_reference == package.source_resolved_reference
 
 
+def test_load_pep_610_compliant_git_packages_with_subdirectory(
+    repository: InstalledRepository,
+):
+    package = get_package_from_repository("git-pep-610-subdirectory", repository)
+    assert package is not None
+    assert package.name == "git-pep-610-subdirectory"
+    assert package.version.text == "1.2.3"
+    assert package.source_type == "git"
+    assert package.source_url == "https://github.com/demo/git-pep-610-subdirectory.git"
+    assert package.source_reference == "my-branch"
+    assert package.source_resolved_reference == "123456"
+    assert package.source_subdirectory == "subdir"
+
+
 def test_load_pep_610_compliant_url_packages(repository: InstalledRepository):
     package = get_package_from_repository("url-pep-610", repository)