diff --git a/src/turbomoleio/testing/__init__.py b/src/turbomoleio/testing/__init__.py
index ff1b70c..4f61ea9 100644
--- a/src/turbomoleio/testing/__init__.py
+++ b/src/turbomoleio/testing/__init__.py
@@ -614,7 +614,7 @@ def compare_differences(actual, desired, rtol=1e-7, atol=0, current_level=None):
                 )
             return differences
     except ValueError as err:
-        if "setting an array element with a sequence." in str(err):
+        if "setting an array element with a sequence." in str(err):  # pragma: no branch
             pass
 
     if isinstance(desired, (list, tuple)):
diff --git a/tests/test_testing.py b/tests/test_testing.py
index 1822b76..b584f27 100644
--- a/tests/test_testing.py
+++ b/tests/test_testing.py
@@ -447,6 +447,12 @@ def test_compare_differences(self):
         assert len(diffs) == 1
         assert diffs[0][1].startswith(f">>>{STRINGS_DIFFER}<<<")
 
+        diffs = compare_differences("samestring", "samestring")
+        assert len(diffs) == 0
+
         diffs = compare_differences([1, 2, 3], [1, 2, [3, 4]])
         assert len(diffs) == 1
         assert diffs[0][1].startswith(f">>>{ARRAYS_DIFFER}<<<")
+
+        diffs = compare_differences([1, 2, [4, 5]], [1, 2, [4, 5]])
+        assert len(diffs) == 0