1 files changed, 30 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-52557.rs b/src/test/ui/issues/issue-52557.rs
new file mode 100644
index 000000000..09f7a8c51
--- /dev/null
+++ b/src/test/ui/issues/issue-52557.rs
@@ -0,0 +1,30 @@
+// run-pass
+#![allow(unused_imports)]
+// This test checks for namespace pollution by private tests.
+// Tests used to marked as public causing name conflicts with normal
+// functions only in test builds.
+
+// compile-flags: --test
+
+mod a {
+    pub fn foo() -> bool {
+        true
+    }
+}
+
+mod b {
+    #[test]
+    fn foo() {
+        local_name(); // ensure the local name still works
+    }
+
+    #[test]
+    fn local_name() {}
+}
+
+use a::*;
+use b::*;
+
+pub fn conflict() {
+    let _: bool = foo();
+}