diff --git a/test/jdk/java/lang/module/ModuleReader/ModuleReaderTest.java b/test/jdk/java/lang/module/ModuleReader/ModuleReaderTest.java
index 61e5914798e..51246b9ba80 100644
--- a/test/jdk/java/lang/module/ModuleReader/ModuleReaderTest.java
+++ b/test/jdk/java/lang/module/ModuleReader/ModuleReaderTest.java
@@ -200,8 +200,9 @@ public void testImage() throws IOException {
 
             // test nulls
             try {
-                reader.find(null);
-                assertTrue(false);
+                Optional<URI> uri = reader.find(null);
+                fail(reader + " unexpected returned "
+                        + uri.map(URI::toString).orElse("empty Optional"));
             } catch (NullPointerException expected) { }
 
             try {