test: make this test fail more clearly
diff --git a/tests/test_testing.py b/tests/test_testing.py
index 48dfe76..6d4a8a3 100644
--- a/tests/test_testing.py
+++ b/tests/test_testing.py
@@ -481,5 +481,9 @@
for i, (source_file, source) in enumerate(all_our_source_files(), start=1):
has_toves = (source_file.name == "test_testing.py") # fmt: skip
assert (("# Twas brillig " + "and the slithy toves") in source) == has_toves
- assert len(source) > 190 # tests/__init__.py is shortest at 196
- assert 100 < i < 140 # currently 117 files
+ # tests/__init__.py is shortest at 196
+ assert len(source) > 190, (
+ f"{source_file} is shorter ({len(source)} bytes) than the expected smallest file"
+ )
+ # currently 119 files
+ assert 100 < i < 140, f"Expected about 118 source files, got {i}"
