diff --git a/ide/vs2019/mimalloc.vcxproj b/ide/vs2019/mimalloc.vcxproj
index 9f967d94..11339def 100644
--- a/ide/vs2019/mimalloc.vcxproj
+++ b/ide/vs2019/mimalloc.vcxproj
@@ -116,7 +116,7 @@
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>../../include</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>MI_DEBUG=3;%(PreprocessorDefinitions);</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MI_DEBUG_TRACE=1;MI_DEBUG=3;%(PreprocessorDefinitions);</PreprocessorDefinitions>
       <CompileAs>CompileAsCpp</CompileAs>
       <SupportJustMyCode>false</SupportJustMyCode>
       <LanguageStandard>Default</LanguageStandard>
diff --git a/src/alloc.c b/src/alloc.c
index d7e8aac8..a51d93b1 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -727,7 +727,7 @@ void* _mi_heap_realloc_zero(mi_heap_t* heap, void* p, size_t newsize, bool zero)
       const size_t start = (size >= sizeof(intptr_t) ? size - sizeof(intptr_t) : 0);
       memset((uint8_t*)newp + start, 0, newsize - start);
     }
-    if (p != NULL) {
+    if (mi_likely(p != NULL)) {
       const size_t copysize = (newsize > size ? size : newsize);
       if (mi_likely(((uintptr_t)p % MI_INTPTR_SIZE) == 0)) {
         _mi_memcpy_aligned(newp, p, copysize);
@@ -735,7 +735,7 @@ void* _mi_heap_realloc_zero(mi_heap_t* heap, void* p, size_t newsize, bool zero)
       else {
         _mi_memcpy(newp, p, copysize);
       }
-      mi_free(p); // only free the original pointer if successful    
+      mi_free(p); // only free the original pointer if successful
     }
   }
   return newp;
diff --git a/test/main-override-static.c b/test/main-override-static.c
index 57dc7882..b22e996e 100644
--- a/test/main-override-static.c
+++ b/test/main-override-static.c
@@ -27,15 +27,15 @@ int main() {
   mi_version();
   mi_stats_reset();
   // detect double frees and heap corruption
-  // double_free1();
+  double_free1();
   // double_free2();
-  double_free3();
-  corrupt_free1();
+  // double_free3();
+  // corrupt_free1();
   // corrupt_free2();
   // block_overflow1();
   // block_overflow2();
   // test_aslr();
-  // invalid_free();
+  invalid_free();
   // test_reserved();
   // negative_stat();
   // alloc_huge();