--- a/dowa/dowa_test.c	Thu Jan 01 14:05:34 2026 -0800
+++ b/dowa/dowa_test.c	Thu Jan 01 14:25:17 2026 -0800
@@ -212,6 +212,58 @@
   Dowa_HashMap_Free(p_large_map);
   printf("  Medium map freed\n\n");
 
+  // --- Test Key Storage Integrity ---
+  printf("Testing Key Storage Integrity (Regression Test)...\n");
+  Dowa_KV(char*, char*)* p_integrity_map = NULL;
+
+  // Simple test first
+  Dowa_HashMap_Push(p_integrity_map, "HTTP_Method", "GET");
+  Dowa_HashMap_Push(p_integrity_map, "Path", "/index.html");
+
+  printf("  Testing simple 2-key map...\n");
+  void* p_method = Dowa_HashMap_Get_Ptr(p_integrity_map, "HTTP_Method");
+  void* p_path = Dowa_HashMap_Get_Ptr(p_integrity_map, "Path");
+
+  if (p_method && p_path)
+  {
+    Dowa_KV(char*, char*)* p_m = (Dowa_KV(char*, char*)*)p_method;
+    Dowa_KV(char*, char*)* p_p = (Dowa_KV(char*, char*)*)p_path;
+    printf("    Method: key='%s', value='%s'\n", p_m->key, p_m->value);
+    printf("    Path: key='%s', value='%s'\n", p_p->key, p_p->value);
+    printf("  PASS: Simple test passed\n");
+  }
+  else
+  {
+    printf("    FAIL: Could not find keys\n");
+  }
+
+  Dowa_HashMap_Free(p_integrity_map);
+  p_integrity_map = NULL;
+
+  // Test with arena allocator
+  printf("  Testing arena-allocated map...\n");
+  Dowa_Arena *p_integrity_arena = Dowa_Arena_Create(4096);
+  Dowa_HashMap_Push_Arena(p_integrity_map, "HTTP_Method", "POST", p_integrity_arena);
+  Dowa_HashMap_Push_Arena(p_integrity_map, "Content-Type", "application/json", p_integrity_arena);
+
+  p_method = Dowa_HashMap_Get_Ptr(p_integrity_map, "HTTP_Method");
+  void* p_content_type = Dowa_HashMap_Get_Ptr(p_integrity_map, "Content-Type");
+
+  if (p_method && p_content_type)
+  {
+    Dowa_KV(char*, char*)* p_m = (Dowa_KV(char*, char*)*)p_method;
+    Dowa_KV(char*, char*)* p_ct = (Dowa_KV(char*, char*)*)p_content_type;
+    printf("    Method: key='%s', value='%s'\n", p_m->key, p_m->value);
+    printf("    Content-Type: key='%s', value='%s'\n", p_ct->key, p_ct->value);
+    printf("  PASS: Arena test passed\n");
+  }
+  else
+  {
+    printf("    FAIL: Could not find keys\n");
+  }
+
+  Dowa_Arena_Free(p_integrity_arena);
+  printf("  Key integrity test complete\n\n");
 
   printf("=== String Manipulations === \n\n");