diff --git a/tests/test_default_image_builders.py b/tests/test_default_image_builders.py
index 1895e4c..f570a4f 100644
--- a/tests/test_default_image_builders.py
+++ b/tests/test_default_image_builders.py
@@ -24,9 +24,9 @@
         "(supported formats: .fds,.fda,.e2e)"
     ],
     "image_builder_tiff": [
-        "Tif image builder: Could not open file with tifffile.",
-        "Tif image builder: Could not open file with OpenSlide.",
-        "Tif image builder: Validation error: Not a valid tif: "
+        "TIFF image builder: Could not open file with tifffile.",
+        "TIFF image builder: Could not open file with OpenSlide.",
+        "TIFF image builder: Validation error: Not a valid tif: "
         "Image width could not be determined.",
     ],
 }