diff --git a/umap/tests/test_utils.py b/umap/tests/test_utils.py
new file mode 100644
index 00000000..85862a03
--- /dev/null
+++ b/umap/tests/test_utils.py
@@ -0,0 +1,14 @@
+from pathlib import Path
+
+from umap.utils import gzip_file
+
+
+def test_gzip_file():
+    # Let's use any old file so we can check that the date of the gzip file is set.
+    src = Path(__file__).parent / "settings.py"
+    dest = Path("/tmp/test_settings.py.gz")
+    gzip_file(src, dest)
+    src_stat = src.stat()
+    dest_stat = dest.stat()
+    dest.unlink()
+    assert src_stat.st_mtime == dest_stat.st_mtime