diff --git a/claudetool/testdata/passing_to_failing.txtar b/claudetool/testdata/passing_to_failing.txtar
index 50afae7..f96208b 100644
--- a/claudetool/testdata/passing_to_failing.txtar
+++ b/claudetool/testdata/passing_to_failing.txtar
@@ -26,7 +26,7 @@
 -- .run_test --
 # Errors
 
-Test regressions detected between initial commit (149798f10aaf06bc4700bb62d46ed6d8d88e35ad) and HEAD:
+Test regressions detected between initial commit (INITIAL_COMMIT_HASH) and HEAD:
 
 1: sketch.dev.TestP: Was passing, now failing