diff --git a/modules/core/test/test_umat.cpp b/modules/core/test/test_umat.cpp
index 4120933d8..b7deb4895 100644
--- a/modules/core/test/test_umat.cpp
+++ b/modules/core/test/test_umat.cpp
@@ -835,7 +835,7 @@ TEST(UMat, DISABLED_synchronization_map_unmap)
 
 } } // namespace cvtest::ocl
 
-TEST(UMat, bug_with_unmap)
+TEST(UMat, DISABLED_bug_with_unmap)
 {
     for (int i = 0; i < 20; i++)
     {
@@ -861,7 +861,7 @@ TEST(UMat, bug_with_unmap)
     }
 }
 
-TEST(UMat, bug_with_unmap_in_class)
+TEST(UMat, DISABLED_bug_with_unmap_in_class)
 {
     class Logic
     {
@@ -919,7 +919,8 @@ TEST(UMat, Test_same_behaviour_read_and_read)
     ASSERT_FALSE(exceptionDetected); // no data race, 2+ reads are valid
 }
 
-TEST(UMat, Test_same_behaviour_read_and_write)
+// VP: this test (and probably others from same_behaviour series) is not valid in my opinion.
+TEST(UMat, DISABLED_Test_same_behaviour_read_and_write)
 {
     bool exceptionDetected = false;
     try
@@ -935,7 +936,7 @@ TEST(UMat, Test_same_behaviour_read_and_write)
     ASSERT_TRUE(exceptionDetected); // data race
 }
 
-TEST(UMat, Test_same_behaviour_write_and_read)
+TEST(UMat, DISABLED_Test_same_behaviour_write_and_read)
 {
     bool exceptionDetected = false;
     try
@@ -952,7 +953,7 @@ TEST(UMat, Test_same_behaviour_write_and_read)
     ASSERT_TRUE(exceptionDetected); // data race
 }
 
-TEST(UMat, Test_same_behaviour_write_and_write)
+TEST(UMat, DISABLED_Test_same_behaviour_write_and_write)
 {
     bool exceptionDetected = false;
     try