diff --git a/tests/functional/test_install_vcs_git.py b/tests/functional/test_install_vcs_git.py
index e19745bb8a2..f4c56eb5373 100644
--- a/tests/functional/test_install_vcs_git.py
+++ b/tests/functional/test_install_vcs_git.py
@@ -67,7 +67,7 @@ def _github_checkout(url_path, temp_dir, rev=None, egg=None, scheme=None):
     return local_url
 
 
-def _make_version_pkg_url(path, rev=None):
+def _make_version_pkg_url(path, rev=None, name="version_pkg"):
     """
     Return a "git+file://" URL to the version_pkg test package.
 
@@ -78,7 +78,7 @@ def _make_version_pkg_url(path, rev=None):
     """
     file_url = _test_path_to_file_url(path)
     url_rev = '' if rev is None else '@{}'.format(rev)
-    url = 'git+{}{}#egg=version_pkg'.format(file_url, url_rev)
+    url = 'git+{}{}#egg={}'.format(file_url, url_rev, name)
 
     return url
 
@@ -476,3 +476,40 @@ def test_check_submodule_addition(script):
         script.venv / 'src/version-pkg/testpkg/static/testfile2'
         in update_result.files_created
     )
+
+
+def test_install_git_branch_not_cached(script, with_wheel):
+    """
+    Installing git urls with a branch revision does not cause wheel caching.
+    """
+    PKG = "gitbranchnotcached"
+    repo_dir = _create_test_package(script, name=PKG)
+    url = _make_version_pkg_url(repo_dir, rev="master", name=PKG)
+    result = script.pip("install", url, "--only-binary=:all:")
+    assert "Successfully built {}".format(PKG) in result.stdout, result.stdout
+    script.pip("uninstall", "-y", PKG)
+    # build occurs on the second install too because it is not cached
+    result = script.pip("install", url)
+    assert (
+        "Successfully built {}".format(PKG) in result.stdout
+    ), result.stdout
+
+
+def test_install_git_sha_cached(script, with_wheel):
+    """
+    Installing git urls with a sha revision does cause wheel caching.
+    """
+    PKG = "gitshacached"
+    repo_dir = _create_test_package(script, name=PKG)
+    commit = script.run(
+        'git', 'rev-parse', 'HEAD', cwd=repo_dir
+    ).stdout.strip()
+    url = _make_version_pkg_url(repo_dir, rev=commit, name=PKG)
+    result = script.pip("install", url)
+    assert "Successfully built {}".format(PKG) in result.stdout, result.stdout
+    script.pip("uninstall", "-y", PKG)
+    # build does not occur on the second install too because it is cached
+    result = script.pip("install", url)
+    assert (
+        "Successfully built {}".format(PKG) not in result.stdout
+    ), result.stdout
diff --git a/tests/unit/test_wheel.py b/tests/unit/test_wheel.py
index 05413f9074e..fc3a7ddb382 100644
--- a/tests/unit/test_wheel.py
+++ b/tests/unit/test_wheel.py
@@ -20,7 +20,7 @@
     MissingCallableSuffix,
     _raise_for_invalid_entrypoint,
 )
-from tests.lib import DATA_DIR, assert_paths_equal
+from tests.lib import DATA_DIR, _create_test_package, assert_paths_equal
 
 
 class ReqMock:
@@ -166,6 +166,21 @@ def check_binary_allowed(req):
     assert should_cache is expected
 
 
+def test_should_cache_git_sha(script, tmpdir):
+    repo_path = _create_test_package(script, name="mypkg")
+    commit = script.run(
+        "git", "rev-parse", "HEAD", cwd=repo_path
+    ).stdout.strip()
+    # a link referencing a sha should be cached
+    url = "git+https://g.c/o/r@" + commit + "#egg=mypkg"
+    req = ReqMock(link=Link(url), source_dir=repo_path)
+    assert wheel.should_cache(req, check_binary_allowed=lambda r: True)
+    # a link not referencing a sha should not be cached
+    url = "git+https://g.c/o/r@master#egg=mypkg"
+    req = ReqMock(link=Link(url), source_dir=repo_path)
+    assert not wheel.should_cache(req, check_binary_allowed=lambda r: True)
+
+
 def test_format_command_result__INFO(caplog):
     caplog.set_level(logging.INFO)
     actual = wheel.format_command_result(