diff --git a/claudetool/testdata/passing_to_failing_subdir.txtar b/claudetool/testdata/passing_to_failing_subdir.txtar
index 1211912..7aaef4a 100644
--- a/claudetool/testdata/passing_to_failing_subdir.txtar
+++ b/claudetool/testdata/passing_to_failing_subdir.txtar
@@ -26,7 +26,7 @@
 -- .run_test --
 # Errors
 
-Test regressions detected between initial commit (8c6c71d0beac5e27b87dfc3f2fd9d274b62c3d3a) and HEAD:
+Test regressions detected between initial commit (INITIAL_COMMIT_HASH) and HEAD:
 
 1: sketch.dev/foo.TestP: Was passing, now failing