diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 4ed83d7024..b6595f60e7 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -171,6 +171,8 @@ (define-public ocaml-4.11
                      (number->string (parallel-job-count))
                      "world.opt")
              #t))
+         ;; FIXME: Test phases are not run.
+         ;; "-find-test-dirs: command not found"
          (replace 'check
            (lambda _
              (invoke "make" "tests")