Add test case

tests/integration/test_uninstall.py

@@ -336,3 +336,26 @@ def test_category_not_sorted_without_directive(pipenv_instance_private_pypi):
             "colorama",
             "atomicwrites",
         ]
+
+
+@pytest.mark.uninstall
+def test_uninstall_whithout_venv(pipenv_instance_private_pypi):
+    with pipenv_instance_private_pypi() as p:
+        with open(p.pipfile_path, "w") as f:
+            contents = """
+[packages]
+colorama = "*"
+atomicwrites = "*"
+            """.strip()
+            f.write(contents)
+
+        c = p.pipenv("install")
+        assert c.returncode == 0
+
+        c = p.pipenv("uninstall --all")
+        assert c.returncode == 0
+        assert list(p.pipfile["packages"].keys()) == [
+            "parse",
+            "colorama",
+            "atomicwrites",
+        ]