diff --git a/fmriprep/utils/tests/test_derivative_cache.py b/fmriprep/utils/tests/test_derivative_cache.py
index 6aebf5d9..5641434e 100644
--- a/fmriprep/utils/tests/test_derivative_cache.py
+++ b/fmriprep/utils/tests/test_derivative_cache.py
@@ -22,11 +22,11 @@ def test_transforms_found_as_str(tmp_path: Path, xfm: str):
         'extension': '.nii.gz',
     }
     if xfm == 'boldref2fmap':
-        to_find = f'sub-{entities['subject']}_task-{entities['task']}_from-{spec['from']}_to-auto00000_mode-image_xfm.txt'  # noqa: E501
+        to_find = f'sub-{entities["subject"]}_task-{entities["task"]}_from-{spec["from"]}_to-auto00000_mode-image_xfm.txt'  # noqa: E501
     else:
-        to_find = f'sub-{entities['subject']}_task-{entities['task']}_from-{spec['from']}_to-{spec['to']}_mode-image_xfm.txt'  # noqa: E501
+        to_find = f'sub-{entities["subject"]}_task-{entities["task"]}_from-{spec["from"]}_to-{spec["to"]}_mode-image_xfm.txt'  # noqa: E501
 
-    funcd = tmp_path / f'sub-{entities['subject']}' / 'func'
+    funcd = tmp_path / f'sub-{entities["subject"]}' / 'func'
     funcd.mkdir(parents=True)
     (funcd / to_find).touch()