diff --git a/lib/tests/test-mu-maildir.cc b/lib/tests/test-mu-maildir.cc
index ded4e191..aee8189c 100644
--- a/lib/tests/test-mu-maildir.cc
+++ b/lib/tests/test-mu-maildir.cc
@@ -98,6 +98,8 @@ test_maildir_mkdir_03()
 static void
 test_maildir_mkdir_04()
 {
+	allow_warnings();
+
 	if (geteuid() == 0) {
 		g_test_skip("not useful when run as root");
 		return;
diff --git a/lib/utils/mu-utils-file.cc b/lib/utils/mu-utils-file.cc
index 5813bcf1..1b8786cd 100644
--- a/lib/utils/mu-utils-file.cc
+++ b/lib/utils/mu-utils-file.cc
@@ -298,7 +298,11 @@ Mu::run_command0(std::initializer_list<std::string> args, bool try_setsid)
 	if (auto&& res{run_command(args, try_setsid)}; !res)
 		return res;
 	else if (res->exit_code != 0)
-		return Err(Error::Code::File, "command ran with non-zero exit code");
+		return Err(Error::Code::File, "command returned {}: {}",
+			   res->exit_code,
+			   res->standard_err.empty() ?
+			   std::string{"something went wrong"}:
+			   res->standard_err);
 	else
 		return Ok(std::move(*res));
 }