diff --git a/tests/testenv/mod.rs b/tests/testenv/mod.rs
index d1cca69..2adcb1e 100644
--- a/tests/testenv/mod.rs
+++ b/tests/testenv/mod.rs
@@ -77,10 +77,12 @@ fn find_fd_exe() -> PathBuf {
 /// Format an error message for when *fd* did not exit successfully.
 fn format_exit_error(args: &[&str], output: &process::Output) -> String {
     format!(
-        "`fd {}` did not exit successfully.\nstdout:\n---\n{}---\nstderr:\n---\n{}---",
+        "`fd {}` did not exit successfully.\nstdout:\n---\n{}---\nstderr:\n---\n{}---\n
+        code:\n---\n{:?}---\n",
         args.join(" "),
         String::from_utf8_lossy(&output.stdout),
-        String::from_utf8_lossy(&output.stderr)
+        String::from_utf8_lossy(&output.stderr),
+        output.status.code()
     )
 }
 
diff --git a/tests/tests.rs b/tests/tests.rs
index 4f22b7b..672cae1 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -550,7 +550,7 @@ fn test_exec() {
         Comparing files a.foo and A.FOO
         FC: no differences encountered",
     );
-    
+
     // Test executing 'diff' with the found result and itself.
-    #[cfg(unix)] te.assert_output(&["--exec", "diff {} {}", "a.foo"],"");
+    #[cfg(unix)] te.assert_output(&["--exec", "diff {} {}", "a.foo"], "");
 }