diff --git a/tests/choose.rs b/tests/choose.rs
index a836e26..8f094ff 100644
--- a/tests/choose.rs
+++ b/tests/choose.rs
@@ -125,11 +125,7 @@ fn invoke_error_function() {
           echo bar
       ",
     )
-    .stderr(if cfg!(windows) {
-      "error: Chooser `/ -cu fzf` invocation failed: Access is denied. (os error 5)\n"
-    } else {
-      "error: Chooser `/ -cu fzf` invocation failed: Permission denied (os error 13)\n"
-    })
+    .stderr_regex("error: Chooser `/ -cu fzf` invocation failed: .*")
     .status(EXIT_FAILURE)
     .shell(false)
     .args(&["--shell", "/", "--choose"])
diff --git a/tests/test.rs b/tests/test.rs
index bee962d..77fb77b 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -125,7 +125,7 @@ impl Test {
   }
 
   pub(crate) fn stderr_regex(mut self, stderr_regex: impl AsRef<str>) -> Self {
-    self.stderr_regex = Some(Regex::new(&format!("^{}$", stderr_regex.as_ref())).unwrap());
+    self.stderr_regex = Some(Regex::new(&format!("(?m)^{}$", stderr_regex.as_ref())).unwrap());
     self
   }
 
@@ -223,7 +223,7 @@ impl Test {
     if let Some(ref stderr_regex) = self.stderr_regex {
       if !stderr_regex.is_match(output_stderr) {
         panic!(
-          "Stderr regex mismatch: {} !~= /{}/",
+          "Stderr regex mismatch:\n{:?}\n!~=\n/{:?}/",
           output_stderr, stderr_regex
         );
       }