diff --git a/src/dune_rules/gen_rules.ml b/src/dune_rules/gen_rules.ml
index 542e2f223d50..fc8cdcd6a675 100644
--- a/src/dune_rules/gen_rules.ml
+++ b/src/dune_rules/gen_rules.ml
@@ -111,15 +111,18 @@ end = struct
     | Alias alias ->
       let+ () = Simple_rules.alias sctx alias ~dir ~expander in
       empty_none
-    | Tests tests ->
-      let+ cctx, merlin =
-        Test_rules.rules tests ~sctx ~dir ~scope ~expander ~dir_contents
-      in
-      { merlin = Some merlin
-      ; cctx = Some (tests.exes.buildable.loc, cctx)
-      ; js = None
-      ; source_dirs = None
-      }
+    | Tests tests -> (
+      Expander.eval_blang expander tests.enabled_if >>= function
+      | false -> Memo.return empty_none
+      | true ->
+        let+ cctx, merlin =
+          Test_rules.rules tests ~sctx ~dir ~scope ~expander ~dir_contents
+        in
+        { merlin = Some merlin
+        ; cctx = Some (tests.exes.buildable.loc, cctx)
+        ; js = None
+        ; source_dirs = None
+        })
     | Copy_files { files = glob; _ } ->
       let* source_dirs =
         let loc = String_with_vars.loc glob in
diff --git a/test/blackbox-tests/test-cases/tests-stanza/github6132.t b/test/blackbox-tests/test-cases/tests-stanza/github6132.t
index 9e2b049b6e91..947e51b767ec 100644
--- a/test/blackbox-tests/test-cases/tests-stanza/github6132.t
+++ b/test/blackbox-tests/test-cases/tests-stanza/github6132.t
@@ -16,11 +16,4 @@
   > EOF
   $ touch missing_test.ml
 
-FIXME: both the missing_test and lib_not are disabled so this error could be
-ignored.
   $ dune build @all
-  File "dune", line 9, characters 10-17:
-  9 |  (modules lib_not)
-                ^^^^^^^
-  Error: Module Lib_not doesn't exist.
-  [1]