diff --git a/tests/test-backend-ops.cpp b/tests/test-backend-ops.cpp
index e6e3e7650..dcbc6d380 100644
--- a/tests/test-backend-ops.cpp
+++ b/tests/test-backend-ops.cpp
@@ -1373,8 +1373,11 @@ static bool test_backend(ggml_backend_t backend, test_mode mode, const char * op
 
     test_cases.emplace_back(new test_sum_rows());
 
+#if !defined(__SANITIZE_THREAD__)
+    // FIXME: these tests use too much memory with thread sanitizer
     test_cases.emplace_back(new test_moe(8, 2, 1, 4096, 14336));
     //test_cases.emplace_back(new test_moe(8, 2, 8, 4096, 14336));
+#endif
 
     // run tests
     if (mode == MODE_TEST) {