diff --git a/tests/test_reference_runs/test_pre_deployment.py b/tests/test_reference_runs/test_pre_deployment.py
index 42b19990b14d9f0e90b2e272b4873debfdcc1991..cdd8a0f015baca42d15d9f3aa123ff992786fbdb 100644
--- a/tests/test_reference_runs/test_pre_deployment.py
+++ b/tests/test_reference_runs/test_pre_deployment.py
@@ -85,9 +85,13 @@ def validate_file(
             ref_ds = fref[dsname]
             out_ds = fout[dsname]
             if out_ds.shape != ref_ds.shape:
-                changed.append((dsname, f"Shape: {ref_ds.shape} -> {out_ds.shape}")) # noqa
+                changed.append((
+                    dsname, f"Shape: {ref_ds.shape} -> {out_ds.shape}"
+                ))
             elif out_ds.dtype != ref_ds.dtype:
-                changed.append((dsname, f"Dtype: {ref_ds.dtype} -> {out_ds.dtype}")) # noqa
+                changed.append((
+                    dsname, f"Dtype: {ref_ds.dtype} -> {out_ds.dtype}"
+                ))
             else:
                 floaty = np.issubdtype(ref_ds.dtype, np.floating) \
                         or np.issubdtype(ref_ds.dtype, np.complexfloating)
@@ -312,7 +316,7 @@ def test_xfel_calibrate(
         )
     )
 
-    report_name = out_folder / f"{test_key}_{datetime.now().strftime('%y%m%d_%H%M%S')}" # noqa
+    report_name = out_folder / f"{test_key}_{datetime.now():%y%m%d_%H%M%S}"
 
     cal_conf["report-to"] = str(report_name)