diff --git a/test/blackbox-tests/test-cases/output-obj/dune b/test/blackbox-tests/test-cases/output-obj/dune
index c4858bf5..591b5ab5 100644
--- a/test/blackbox-tests/test-cases/output-obj/dune
+++ b/test/blackbox-tests/test-cases/output-obj/dune
@@ -21,19 +21,19 @@
 (rule
  (targets static.exe)
  (deps test.exe%{ext_obj} static.c)
- (action (run %{CC} -o %{targets} -I %{ocaml_where} -I . %{deps}
+ (action (run %{cc} -o %{targets} -I %{ocaml_where} -I . %{deps}
           %{ocaml-config:native_c_libraries})))
 
 (rule
  (targets static.bc)
  (deps test.bc%{ext_obj} static.c)
- (action (run %{CC} -o %{targets} -I %{ocaml_where} -I . %{deps}
+ (action (run %{cc} -o %{targets} -I %{ocaml_where} -I . %{deps}
           %{ocaml-config:bytecomp_c_libraries})))
 
 (rule
  (targets dynamic.exe)
  (deps dynamic.c)
- (action (run %{CC} -o %{targets} %{first-dep} %{ocaml-config:native_c_libraries})))
+ (action (run %{cc} -o %{targets} %{first-dep} %{ocaml-config:native_c_libraries})))
 
 (alias
  (name runtest)