Fix

Author: d-kalinichenko

ocaml/ocamltest/ocaml_actions.ml

@@ -804,14 +804,13 @@ let run_expect_once input_file principal log env =
     directory_flags env;
     Ocaml_flags.include_toplevel_directory;
     flags env;
-    repo_root;
     principal_flag;
     libraries Bytecode env;
     binary_modules Bytecode env;
     input_file
   ] in
   let exit_status =
-    Actions_helpers.run_cmd ~environment log env commandline
+    Actions_helpers.run_cmd ~environment:default_ocaml_env log env commandline
   in
   if exit_status=0 then (Result.pass, env)
   else begin