1 files changed, 22 insertions, 0 deletions
diff --git a/tests/integration/credentials/utils_test.py b/tests/integration/credentials/utils_test.py
new file mode 100644
index 0000000..d7b2a1a
--- /dev/null
+++ b/tests/integration/credentials/utils_test.py
@@ -0,0 +1,22 @@
+import os
+
+from docker.credentials.utils import create_environment_dict
+
+try:
+    from unittest import mock
+except ImportError:
+    from unittest import mock
+
+
+@mock.patch.dict(os.environ)
+def test_create_environment_dict():
+    base = {'FOO': 'bar', 'BAZ': 'foobar'}
+    os.environ = base
+    assert create_environment_dict({'FOO': 'baz'}) == {
+        'FOO': 'baz', 'BAZ': 'foobar',
+    }
+    assert create_environment_dict({'HELLO': 'world'}) == {
+        'FOO': 'bar', 'BAZ': 'foobar', 'HELLO': 'world',
+    }
+
+    assert os.environ == base