diff --git a/src/hotspot/share/runtime/globals.hpp b/src/hotspot/share/runtime/globals.hpp
index 11c13fe3c9e19..1966d370ca20f 100644
--- a/src/hotspot/share/runtime/globals.hpp
+++ b/src/hotspot/share/runtime/globals.hpp
@@ -1978,16 +1978,16 @@ const int ObjectAlignmentInBytes = 8;
                 "rewriting/transformation independently of the JVMTI "      \
                 "can_{retransform/redefine}_classes capabilities.")         \
                                                                             \
-  product(bool, UseSecondarySupersCache, true, DIAGNOSTIC,                  \
+  product(bool, UseSecondarySupersCache, false, DIAGNOSTIC,                  \
                 "Use secondary supers cache during subtype checks.")        \
                                                                             \
-  product(bool, UseSecondarySupersTable, false, DIAGNOSTIC,                 \
+  product(bool, UseSecondarySupersTable, true, DIAGNOSTIC,                 \
                 "Use hash table to lookup secondary supers.")               \
                                                                             \
-  product(bool, VerifySecondarySupers, false, DIAGNOSTIC,                   \
+  product(bool, VerifySecondarySupers, true, DIAGNOSTIC,                   \
           "Check that linear and hashed secondary lookups return the same result.") \
                                                                             \
-  product(bool, StressSecondarySupers, false, DIAGNOSTIC,                   \
+  product(bool, StressSecondarySupers, true, DIAGNOSTIC,                   \
           "Use a terrible hash function in order to generate many collisions.") \
                                                                             \
   product(bool, UseThreadsLockThrottleLock, true, DIAGNOSTIC,               \