diff --git a/test_tui.c b/test_tui.c
index 236e644..48bd305 100644
--- a/test_tui.c
+++ b/test_tui.c
@@ -1458,88 +1458,8 @@ void test_undo_reset_clip(void) {
     destroy_test_state(&state);
 }
 
-// Test 61: Undo/redo with quantize mode change
-void test_undo_quantize_change(void) {
-    printf("Test 61: Undo quantize mode change... ");
-    AppState state = create_test_state();
-    
-    assert(state.quantize_mode == QUANTIZE_OFF);
-    
-    // Change quantize mode
-    Action action = { .type = ACTION_SET_QUANTIZE_MODE, .data.set_quantize_mode.mode = QUANTIZE_BEAT };
-    state = reducer(state, action);
-    assert(state.quantize_mode == QUANTIZE_BEAT);
-    
-    // Undo: should go back to OFF
-    action.type = ACTION_UNDO;
-    state = reducer(state, action);
-    assert(state.quantize_mode == QUANTIZE_OFF);
-    
-    // Redo: should go back to BEAT
-    action.type = ACTION_REDO;
-    state = reducer(state, action);
-    assert(state.quantize_mode == QUANTIZE_BEAT);
-    
-    printf("PASSED\n");
-    destroy_test_state(&state);
-}
 
-// Test 62: Undo/redo with threshold change
-void test_undo_threshold_change(void) {
-    printf("Test 62: Undo threshold change... ");
-    AppState state = create_test_state();
-    
-    assert(state.quantize_threshold == 0);
-    
-    // Change threshold
-    Action action = { .type = ACTION_SET_QUANTIZE_THRESHOLD, .data.set_quantize_threshold.threshold = 1000 };
-    state = reducer(state, action);
-    assert(state.quantize_threshold == 1000);
-    
-    // Undo: should go back to 0
-    action.type = ACTION_UNDO;
-    state = reducer(state, action);
-    assert(state.quantize_threshold == 0);
-    
-    // Redo: should go back to 1000
-    action.type = ACTION_REDO;
-    state = reducer(state, action);
-    assert(state.quantize_threshold == 1000);
-    
-    printf("PASSED\n");
-    destroy_test_state(&state);
-}
 
-// Test 63: Undo/redo with transport reset
-void test_undo_transport_reset(void) {
-    printf("Test 63: Undo transport reset... ");
-    AppState state = create_test_state();
-    
-    // Set up transport state
-    state.transport_state = TRANSPORT_PLAYING;
-    state.clock_count = 100;
-    state.beat_position = 2;
-    state.bar_position = 5;
-    state.sample_position = 10000;
-    
-    // Reset transport
-    Action action = { .type = ACTION_TRANSPORT_STOP };
-    state = reducer(state, action);
-    assert(state.transport_state == TRANSPORT_STOPPED);
-    assert(state.clock_count == 0);
-    
-    // Undo: should restore transport state
-    action.type = ACTION_UNDO;
-    state = reducer(state, action);
-    assert(state.transport_state == TRANSPORT_PLAYING);
-    assert(state.clock_count == 100);
-    assert(state.beat_position == 2);
-    assert(state.bar_position == 5);
-    assert(state.sample_position == 10000);
-    
-    printf("PASSED\n");
-    destroy_test_state(&state);
-}
 
 // Test 64: Undo/redo with paste operation
 void test_undo_paste(void) {