diff --git a/tests/test_gc.py b/tests/test_gc.py
index c951f62..eff25a5 100644
--- a/tests/test_gc.py
+++ b/tests/test_gc.py
@@ -38,10 +38,30 @@ def common_test(direnv_project: DirenvProject) -> None:
     assert "Executing shellHook." in out2.stderr
 
 
+def common_test_clean(direnv_project: DirenvProject, num_expected_files: int) -> None:
+    testenv = str(direnv_project.dir)
+
+    out3 = run(
+        ["direnv", "exec", testenv, "hello"],
+        stderr=subprocess.PIPE,
+        check=False,
+        cwd=direnv_project.dir,
+    )
+    sys.stderr.write(out3.stderr)
+
+    files = list((direnv_project.dir / ".direnv").iterdir())
+    assert len(files) == num_expected_files
+
+
 def test_use_nix(direnv_project: DirenvProject) -> None:
     direnv_project.setup_envrc("use nix")
     common_test(direnv_project)
 
+    # --pure here is just a way to make sure the environment changes
+    direnv_project.setup_envrc("use nix --pure")
+    # expecting 2 files in .direnv/ : nix-profile-* and nix-profile-*.rc
+    common_test_clean(direnv_project, num_expected_files=2)
+
 
 def test_use_flake(direnv_project: DirenvProject) -> None:
     direnv_project.setup_envrc("use flake")
@@ -55,6 +75,12 @@ def test_use_flake(direnv_project: DirenvProject) -> None:
     for symlink in inputs:
         assert symlink.is_dir()
 
+    # --ignore-environment here is just a way to make sure the environment changes
+    direnv_project.setup_envrc("use flake --ignore-environment")
+    # expecting 5 files in .direnv/ : 2 x nix-flake-*, 2 x nix-flake-*.rc
+    # and flake-inputs
+    common_test_clean(direnv_project, num_expected_files=5)
+
 
 if __name__ == "__main__":
     unittest.main()