diff --git a/test/cram/dune b/test/cram/dune
index 4e14d35f..d6a541ca 100644
--- a/test/cram/dune
+++ b/test/cram/dune
@@ -1,3 +1,10 @@
+; ocaml-ci fix: ocamlfind warns on relative paths in ld.conf (OCaml >= 5.5),
+; breaking cram output; safe to ignore, no C stubs linked here.
+(env
+ (_
+  (env-vars
+   (OCAMLFIND_LDCONF ignore))))
+
 (cram
  (deps
   %{bin:sqlgg}
diff --git a/test/cram/test_migrations/migrate-idempotent-codegen.t/run.t b/test/cram/test_migrations/migrate-idempotent-codegen.t/run.t
index 8f598bd4..44540205 100644
--- a/test/cram/test_migrations/migrate-idempotent-codegen.t/run.t
+++ b/test/cram/test_migrations/migrate-idempotent-codegen.t/run.t
@@ -26,8 +26,7 @@ The human-facing note goes to stderr, not stdout:
 
 migrations.sql stays empty - nothing is appended on a no-op:
 
-  $ wc -c < migrations.sql
-  0
+  $ test ! -s migrations.sql
 
 Running it again produces byte-identical stdout (true idempotency):