diff --git a/core/codegen/tests/ui-fail-nightly/typed-uri-bad-type.stderr b/core/codegen/tests/ui-fail-nightly/typed-uri-bad-type.stderr
index 80f0077c..9f527cdf 100644
--- a/core/codegen/tests/ui-fail-nightly/typed-uri-bad-type.stderr
+++ b/core/codegen/tests/ui-fail-nightly/typed-uri-bad-type.stderr
@@ -1,3 +1,9 @@
+error[E0271]: type mismatch resolving `<std::string::String as FromParam<'_>>::Error == &str`
+  --> $DIR/typed-uri-bad-type.rs:22:37
+   |
+22 | fn optionals(id: Option<i32>, name: Result<String, &str>) {  }
+   |                                     ^^^^^^^^^^^^^^^^^^^^ expected enum `Infallible`, found `&str`
+
 error[E0277]: the trait bound `usize: FromUriParam<rocket::http::uri::fmt::Path, &str>` is not satisfied
   --> $DIR/typed-uri-bad-type.rs:45:22
    |
diff --git a/core/codegen/tests/ui-fail-nightly/typed-uris-bad-params.stderr b/core/codegen/tests/ui-fail-nightly/typed-uris-bad-params.stderr
index 59ebe538..bb655f68 100644
--- a/core/codegen/tests/ui-fail-nightly/typed-uris-bad-params.stderr
+++ b/core/codegen/tests/ui-fail-nightly/typed-uris-bad-params.stderr
@@ -280,3 +280,9 @@ error: route expects 1 parameter but 0 were supplied
    |          ^^^^^^^
    |
    = note: route `has_one` has uri "/<id>"
+
+error[E0271]: type mismatch resolving `<std::string::String as FromParam<'_>>::Error == &str`
+  --> $DIR/typed-uris-bad-params.rs:15:37
+   |
+15 | fn optionals(id: Option<i32>, name: Result<String, &str>) {  }
+   |                                     ^^^^^^^^^^^^^^^^^^^^ expected enum `Infallible`, found `&str`
diff --git a/core/codegen/tests/ui-fail-stable/typed-uri-bad-type.stderr b/core/codegen/tests/ui-fail-stable/typed-uri-bad-type.stderr
index c80c51b5..6d6348ac 100644
--- a/core/codegen/tests/ui-fail-stable/typed-uri-bad-type.stderr
+++ b/core/codegen/tests/ui-fail-stable/typed-uri-bad-type.stderr
@@ -1,3 +1,9 @@
+error[E0271]: type mismatch resolving `<std::string::String as FromParam<'_>>::Error == &str`
+  --> $DIR/typed-uri-bad-type.rs:22:37
+   |
+22 | fn optionals(id: Option<i32>, name: Result<String, &str>) {  }
+   |                                     ^^^^^^ expected enum `Infallible`, found `&str`
+
 error[E0277]: the trait bound `usize: FromUriParam<rocket::http::uri::fmt::Path, &str>` is not satisfied
   --> $DIR/typed-uri-bad-type.rs:45:22
    |
diff --git a/core/codegen/tests/ui-fail-stable/typed-uris-bad-params.stderr b/core/codegen/tests/ui-fail-stable/typed-uris-bad-params.stderr
index ae95f4f0..aad543f3 100644
--- a/core/codegen/tests/ui-fail-stable/typed-uris-bad-params.stderr
+++ b/core/codegen/tests/ui-fail-stable/typed-uris-bad-params.stderr
@@ -271,3 +271,9 @@ error: route expects 1 parameter but 0 were supplied
    |
 21 |     uri!(has_one);
    |          ^^^^^^^
+
+error[E0271]: type mismatch resolving `<std::string::String as FromParam<'_>>::Error == &str`
+  --> $DIR/typed-uris-bad-params.rs:15:37
+   |
+15 | fn optionals(id: Option<i32>, name: Result<String, &str>) {  }
+   |                                     ^^^^^^ expected enum `Infallible`, found `&str`
diff --git a/core/codegen/tests/ui-fail.rs b/core/codegen/tests/ui-fail.rs
index 666ec6fe..1cd5552a 100644
--- a/core/codegen/tests/ui-fail.rs
+++ b/core/codegen/tests/ui-fail.rs
@@ -5,10 +5,6 @@ fn ui() {
         _ => "ui-fail-stable"
     };
 
-    let glob = std::env::args().last()
-        .map(|arg| format!("*{}*.rs", arg))
-        .unwrap_or_else(|| "*.rs".into());
-
     let t = trybuild::TestCases::new();
-    t.compile_fail(format!("tests/{}/{}", path, glob));
+    t.compile_fail(format!("tests/{}/*.rs", path));
 }