diff --git a/tests/test-vad-full.cpp b/tests/test-vad-full.cpp
index 8295b06d..6a5812d5 100644
--- a/tests/test-vad-full.cpp
+++ b/tests/test-vad-full.cpp
@@ -37,7 +37,7 @@ int main() {
     wparams.vad_params.max_speech_duration_s   = FLT_MAX;
     wparams.vad_params.speech_pad_ms           = 30;
 
-    assert(whisper_full_parallel(wctx, wparams, pcmf32.data(), pcmf32.size(), 1) == 0);
+    assert(whisper_full_parallel(wctx, wparams, pcmf32.data(), static_cast<int>(pcmf32.size()), 1) == 0);
 
     const int n_segments = whisper_full_n_segments(wctx);
     assert(n_segments == 1);
diff --git a/tests/test-vad.cpp b/tests/test-vad.cpp
index 0003ae3a..78e150b1 100644
--- a/tests/test-vad.cpp
+++ b/tests/test-vad.cpp
@@ -71,7 +71,7 @@ int main() {
     assert_default_params(params);
 
     // Test speech probabilites
-    test_detect_speech(vctx, params, pcmf32.data(), pcmf32.size());
+    test_detect_speech(vctx, params, pcmf32.data(), static_cast<int>(pcmf32.size()));
 
     // Test speech timestamps (uses speech probabilities from above)
     struct whisper_vad_segments * timestamps = test_detect_timestamps(vctx, params);