diff -r a13e33fd5c2e -r 88540bb74300 rt/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/ReflectionTest.java
--- a/rt/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/ReflectionTest.java	Wed Feb 27 14:38:16 2013 +0100
+++ b/rt/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/ReflectionTest.java	Mon Mar 25 16:16:30 2013 +0100
@@ -53,6 +53,22 @@
         return Runnable.class.isInterface();
     }
 
+    @Compare public boolean isAssignableToPrimitiveType() {
+        return boolean.class.isAssignableFrom(Runnable.class);
+    }
+
+    @Compare public boolean isAssignableFromPrimitiveType() {
+        return Runnable.class.isAssignableFrom(boolean.class);
+    }
+
+    @Compare public boolean isAssignableLongFromInt() {
+        return long.class.isAssignableFrom(int.class);
+    }
+
+    @Compare public boolean isAssignableIntFromLong() {
+        return int.class.isAssignableFrom(long.class);
+    }
+
     @Compare public String isRunnableHasRunMethod() throws NoSuchMethodException {
         return Runnable.class.getMethod("run").getName();
     }