diff --git a/hemx-test/src/lib.rs b/hemx-test/src/lib.rs
index 695e2c8..edf4ee7 100644
--- a/hemx-test/src/lib.rs
+++ b/hemx-test/src/lib.rs
@@ -233,7 +233,7 @@ pub fn document_title_selector() -> &'static str {
 /// Build a selector for the hemx runtime script without exposing its asset path in tests.
 /// req: test/001 req: dx/006
 pub fn runtime_script_selector() -> &'static str {
-    "script[src=\"/hemx.js\"]"
+    "script[src^=\"/hemx.\"][src$=\".js\"]"
 }
 
 /// Build a selector for any hemx root without spelling the attribute in tests.
diff --git a/hemx-test/tests/inspector.rs b/hemx-test/tests/inspector.rs
index 9915ce7..b4e7a2d 100644
--- a/hemx-test/tests/inspector.rs
+++ b/hemx-test/tests/inspector.rs
@@ -61,7 +61,7 @@ fn builds_authoring_boundary_selectors() {
     assert_eq!(hemx_test::document_title_selector(), "title");
     assert_eq!(
         hemx_test::runtime_script_selector(),
-        r#"script[src="/hemx.js"]"#
+        r#"script[src^="/hemx."][src$=".js"]"#
     );
     assert_eq!(
         hemx_test::target_selector(TestTarget(ResourceKind::Slot, 42)),