diff --git a/tests/test_fetchez_module.py b/tests/test_fetchez_module.py
new file mode 100644
index 0000000..f82eca5
--- /dev/null
+++ b/tests/test_fetchez_module.py
@@ -0,0 +1,21 @@
+import numpy as np
+import rasterio
+
+from fetchez.spatial import Region
+from transformez.fetchez.modules.modules import TransformezMod
+
+
+def test_generate_identity_grid(tmp_path):
+    module = TransformezMod(
+        src_region=Region(-67.001, -67.0, 44.9, 44.901),
+        src_datum="EPSG:5703",
+        dst_datum="EPSG:5703",
+        increment="1s",
+        epoch_in="2020.0",
+        epoch_out="2020.0",
+        outdir=str(tmp_path),
+    )
+    module.run()
+    with rasterio.open(module.dst_fn) as dataset:
+        np.testing.assert_allclose(dataset.read(1), 0.0, atol=1e-6)
+    assert module.results[0]["meta"]["dst_datum"] == "EPSG:5703"