diff --git a/Tests/test_file_eps.py b/Tests/test_file_eps.py
index 1c3a2a1d1..506e36e7d 100644
--- a/Tests/test_file_eps.py
+++ b/Tests/test_file_eps.py
@@ -102,6 +102,8 @@ def test_load() -> None:
         assert px[0, 0] == (255, 255, 255)
 
         # Test again now that it has already been loaded once
+        px = im.load()
+        assert px is not None
         assert px[0, 0] == (255, 255, 255)
 
 
diff --git a/Tests/test_file_gbr.py b/Tests/test_file_gbr.py
index 19ef2ddde..1b834cd3c 100644
--- a/Tests/test_file_gbr.py
+++ b/Tests/test_file_gbr.py
@@ -19,6 +19,8 @@ def test_load() -> None:
         assert px[0, 0] == (0, 0, 0, 0)
 
         # Test again now that it has already been loaded once
+        px = im.load()
+        assert px is not None
         assert px[0, 0] == (0, 0, 0, 0)
 
 
diff --git a/Tests/test_file_wal.py b/Tests/test_file_wal.py
index bd1036712..b15d79d61 100644
--- a/Tests/test_file_wal.py
+++ b/Tests/test_file_wal.py
@@ -26,4 +26,6 @@ def test_load() -> None:
         assert px[0, 0] == 122
 
         # Test again now that it has already been loaded once
+        px = im.load()
+        assert px is not None
         assert px[0, 0] == 122