--- a/test/hotspot/gtest/metaspace/metaspaceTestsCommon.cpp	Tue Nov 19 16:53:17 2019 +0100
+++ b/test/hotspot/gtest/metaspace/metaspaceTestsCommon.cpp	Tue Nov 19 16:58:25 2019 +0100
@@ -100,8 +100,8 @@
 
 
 void zap_range(MetaWord* p, size_t word_size) {
-  for (MetaWord* pzap = p; pzap < p + word_size; pzap += os::vm_page_size()) {
-    *pzap = 0;
+  for (MetaWord* pzap = p; pzap < p + word_size; pzap += os::vm_page_size() / BytesPerWord) {
+    *pzap = (MetaWord)0xFEFEFEFE;
   }
 }