diff --git a/src/server/CMakeLists.txt b/src/server/CMakeLists.txt
index ebf0e147d..d8dbdf7d5 100644
--- a/src/server/CMakeLists.txt
+++ b/src/server/CMakeLists.txt
@@ -98,6 +98,9 @@ endif()
 add_library(dfly_test_lib test_utils.cc)
 cxx_link(dfly_test_lib dragonfly_lib facade_test gtest_main_ext)
 
+if (WITH_ASAN OR WITH_USAN)
+  target_compile_definitions(dfly_test_lib PRIVATE SANITIZERS)
+endif()
 
 cxx_test(dragonfly_test dfly_test_lib LABELS DFLY)
 cxx_test(multi_test dfly_test_lib LABELS DFLY)
diff --git a/src/server/rdb_test.cc b/src/server/rdb_test.cc
index 861141106..6a3123578 100644
--- a/src/server/rdb_test.cc
+++ b/src/server/rdb_test.cc
@@ -42,14 +42,6 @@ class RdbTest : public BaseFamilyTest {
  protected:
   void SetUp();
 
-  static void SetUpTestSuite() {
-    static bool init = true;
-    if (exchange(init, false)) {
-      fb2::SetDefaultStackResource(&fb2::std_malloc_resource, 32_KB);
-    }
-    BaseFamilyTest::SetUpTestSuite();
-  }
-
   io::FileSource GetSource(string name);
 
   std::error_code LoadRdb(const string& filename) {
diff --git a/src/server/test_utils.cc b/src/server/test_utils.cc
index a942a8e8c..34ef119da 100644
--- a/src/server/test_utils.cc
+++ b/src/server/test_utils.cc
@@ -34,6 +34,23 @@ ABSL_FLAG(bool, force_epoll, false, "If true, uses epoll api instead iouring to
 ABSL_DECLARE_FLAG(uint32_t, acllog_max_len);
 namespace dfly {
 
+namespace {
+
+// Default stack size for fibers. We decrease it by 16 bytes because some allocators
+// need additional 8-16 bytes for their internal structures, thus over reserving additional
+// memory pages if using round sizes.
+#ifdef NDEBUG
+constexpr size_t kFiberDefaultStackSize = 32_KB - 16;
+#elif defined SANITIZERS
+// Increase stack size for sanitizers builds.
+constexpr size_t kFiberDefaultStackSize = 64_KB - 16;
+#else
+// Increase stack size for debug builds.
+constexpr size_t kFiberDefaultStackSize = 50_KB - 16;
+#endif
+
+}  // namespace
+
 std::ostream& operator<<(std::ostream& os, const DbStats& stats) {
   os << "keycount: " << stats.key_count << ", tiered_size: " << stats.tiered_used_bytes
      << ", tiered_entries: " << stats.tiered_entries << "\n";
@@ -168,6 +185,12 @@ void BaseFamilyTest::SetUpTestSuite() {
 
   absl::SetFlag(&FLAGS_rss_oom_deny_ratio, -1);
   absl::SetFlag(&FLAGS_dbfilename, "");
+
+  static bool init = true;
+  if (exchange(init, false)) {
+    fb2::SetDefaultStackResource(&fb2::std_malloc_resource, kFiberDefaultStackSize);
+  }
+
   init_zmalloc_threadlocal(mi_heap_get_backing());
 
   // TODO: go over all env variables starting with FLAGS_ and make sure they are in the below list.