diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 9d7479817..4171c126c 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -10,5 +10,5 @@ llama_add_test(test-quantize-fns.cpp)
 llama_add_test(test-quantize-perf.cpp)
 llama_add_test(test-sampling.cpp)
 llama_add_test(test-tokenizer-0.cpp ${CMAKE_CURRENT_SOURCE_DIR}/../models/ggml-vocab.bin)
-llama_add_test(test-grad0.c)
-llama_add_test(test-opt.c)
+# llama_add_test(test-grad0.c) # SLOW
+# llama_add_test(test-opt.c) # SLOW