diff --git a/tests/test_metadata.py b/tests/test_metadata.py
index e5a927b4..2b6e4f96 100644
--- a/tests/test_metadata.py
+++ b/tests/test_metadata.py
@@ -231,6 +231,13 @@ def test_ignore_constraints(self) -> None:
                 msg=f"Table {table.name} has non-primary key constraints defined",
             )
 
+    def test_bad_schema_type(self) -> None:
+        """Test that an error is raised if an object with the wrong type is
+        passed to the builder.
+        """
+        with self.assertRaises(TypeError):
+            MetaDataBuilder("not_a_schema")
+
 
 if __name__ == "__main__":
     unittest.main()