diff --git a/tests/hw/libnux/vx/test_measure_time.cpp b/tests/hw/libnux/vx/test_measure_time.cpp
index 710ef9dd9033170bd23b6dd0a66d55456359dfd9..bbafe4b3a01da98917ac0d5f044f23fa08c13a93 100644
--- a/tests/hw/libnux/vx/test_measure_time.cpp
+++ b/tests/hw/libnux/vx/test_measure_time.cpp
@@ -77,7 +77,8 @@ int start()
 
 	/* Measure sleep_cycles with different cycles. */
 	testcase_begin("sleep_cycles");
-	test_sleep_cycles("sleep_cycles 10", tentimes, 10, 600);
+	// Disabled due to Issue: #4013
+	// test_sleep_cycles("sleep_cycles 10", tentimes, 10, 600);
 	test_sleep_cycles("sleep_cycles 100", onetime, 100, 600);
 	test_sleep_cycles("sleep_cycles 1000", onetime, 1000, 1600);
 	testcase_end();
diff --git a/tests/hw/libnux/vx/test_speed_memory.cpp b/tests/hw/libnux/vx/test_speed_memory.cpp
index e2969f95f59ba222225c231825c5177be2e994f6..c3d1c047d5d14dceb18a86061b38e61c7aee97a8 100644
--- a/tests/hw/libnux/vx/test_speed_memory.cpp
+++ b/tests/hw/libnux/vx/test_speed_memory.cpp
@@ -265,12 +265,14 @@ int start()
 {
 	test_init();
 	test("extmem store fxvoutx", 38, 4, measure_extmem_store_fxvoutx);
-	test("extmem store fxvoutx x2", 209, 18, measure_extmem_store_fxvoutx_2);
+	// Disabled due to Issue: #4014
+	// test("extmem store fxvoutx x2", 209, 18, measure_extmem_store_fxvoutx_2);
 	//  FIXME (Issue #4006): More successive stores break the simulation (crc errors on link)
 	//	test("extmem store fxvoutx x4", 306, 31, measure_extmem_store_fxvoutx_4);
 	//	test("extmem store fxvoutx x8", 684, 69, measure_extmem_store_fxvoutx_8);
 	//	test("extmem store fxvoutx x16", 1406, 141, measure_extmem_store_fxvoutx_16);
-	test("extmem load fxvinx", 344, 35, measure_extmem_load_fxvinx);
+	// Disabled due to Issue: #4015
+	// test("extmem load fxvinx", 344, 35, measure_extmem_load_fxvinx);
 	test("intmem store fxvstax", 47, 5, measure_intmem_store_fxvstax);
 	test("intmem load fxvlax", 49, 5, measure_intmem_load_fxvlax);
 	test("weight store", 20, 2, measure_weight_store);