diff --git a/gcc/testsuite/rust/compile/name_resolution23.rs b/gcc/testsuite/rust/compile/name_resolution23.rs
new file mode 100644
index 000000000000..50b8e8111525
--- /dev/null
+++ b/gcc/testsuite/rust/compile/name_resolution23.rs
@@ -0,0 +1,19 @@
+// { dg-options "-frust-name-resolution-2.0" }
+
+mod a {
+    pub mod b {
+        pub fn foo() {}
+        pub fn bar() {}
+        pub fn baz() {}
+    }
+    pub fn baz() {}
+}
+
+use a::b::*;
+use a::baz;
+
+pub fn func() {
+    baz();
+    foo();
+    bar();
+}
diff --git a/gcc/testsuite/rust/compile/name_resolution24.rs b/gcc/testsuite/rust/compile/name_resolution24.rs
new file mode 100644
index 000000000000..f4eb7b2d38fd
--- /dev/null
+++ b/gcc/testsuite/rust/compile/name_resolution24.rs
@@ -0,0 +1,15 @@
+// { dg-options "-frust-name-resolution-2.0" }
+
+mod a {
+    pub mod b {
+        pub fn baz() {}
+    }
+    pub fn baz() {}
+}
+
+use a::b::*;
+use a::*;
+
+pub fn func() {
+    baz(); // { dg-error ".baz. is ambiguous .E0659." }
+}