diff --git a/tests/test_assert.cpp b/tests/test_assert.cpp
new file mode 100644
index 0000000..794ffe7
--- /dev/null
+++ b/tests/test_assert.cpp
@@ -0,0 +1,69 @@
+#include "test_assert.h"
+
+#include <assert.h>
+
+#ifdef _MSC_VER
+#  include <crtdbg.h>
+#  include <windows.h>
+#endif
+
+int testing_fails = 0;
+static TestFailEventListener fail_listener_ = nullptr;
+
+void TestFail(const char *expval, const char *val, const char *exp,
+              const char *file, int line, const char *func) {
+  TEST_OUTPUT_LINE("VALUE: \"%s\"", expval);
+  TEST_OUTPUT_LINE("EXPECTED: \"%s\"", val);
+  TEST_OUTPUT_LINE("TEST FAILED: %s:%d, %s in %s", file, line, exp,
+                   func ? func : "");
+  testing_fails++;
+
+  // Notify, emulate 'gtest::OnTestPartResult' event handler.
+  if (fail_listener_) (*fail_listener_)(expval, val, exp, file, line, func);
+
+  assert(0);  // ignored in Release if NDEBUG defined
+}
+
+void TestEqStr(const char *expval, const char *val, const char *exp,
+               const char *file, int line) {
+  if (strcmp(expval, val) != 0) { TestFail(expval, val, exp, file, line); }
+}
+
+#if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING) && defined(_MSC_VER) && \
+    defined(_DEBUG)
+#define FLATBUFFERS_MEMORY_LEAK_TRACKING_MSVC
+#endif
+
+void InitTestEngine(TestFailEventListener listener) {
+  testing_fails = 0;
+  // Disable stdout buffering to prevent information lost on assertion or core
+  // dump.
+  setvbuf(stdout, NULL, _IONBF, 0);
+  setvbuf(stderr, NULL, _IONBF, 0);
+
+  flatbuffers::SetupDefaultCRTReportMode();
+
+  // clang-format off
+
+  #if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING_MSVC)
+    // For more thorough checking:
+    // _CRTDBG_DELAY_FREE_MEM_DF | _CRTDBG_CHECK_ALWAYS_DF
+    auto flags = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
+    _CrtSetDbgFlag(flags | _CRTDBG_ALLOC_MEM_DF);
+  #endif
+  // clang-format on
+
+  fail_listener_ = listener;
+}
+
+int CloseTestEngine(bool force_report) {
+  if (!testing_fails || force_report) {
+  #if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING_MSVC)
+      auto flags = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
+      flags &= ~_CRTDBG_DELAY_FREE_MEM_DF;
+      flags |= _CRTDBG_LEAK_CHECK_DF;
+      _CrtSetDbgFlag(flags);
+  #endif
+  }
+  return (0 != testing_fails);
+}