diff --git a/modules/gpu/src/cuda/generalized_hough.cu b/modules/gpu/src/cuda/generalized_hough.cu
index 35451e7e2..5e2041eae 100644
--- a/modules/gpu/src/cuda/generalized_hough.cu
+++ b/modules/gpu/src/cuda/generalized_hough.cu
@@ -40,8 +40,6 @@
 //
 //M*/
 
-#define CUDA_DISABLER
-
 #if !defined CUDA_DISABLER
 
 #include <thrust/device_ptr.h>
diff --git a/modules/gpu/src/generalized_hough.cpp b/modules/gpu/src/generalized_hough.cpp
index 867ba7ee7..a92c37d1a 100644
--- a/modules/gpu/src/generalized_hough.cpp
+++ b/modules/gpu/src/generalized_hough.cpp
@@ -40,8 +40,6 @@
 //
 //M*/
 
-#define CUDA_DISABLER
-
 #include "precomp.hpp"
 
 using namespace std;
diff --git a/modules/gpu/test/test_color.cpp b/modules/gpu/test/test_color.cpp
index 16f5fc84e..321785ffe 100644
--- a/modules/gpu/test/test_color.cpp
+++ b/modules/gpu/test/test_color.cpp
@@ -715,7 +715,7 @@ GPU_TEST_P(CvtColor, BGR2YCrCb)
     cv::Mat dst_gold;
     cv::cvtColor(src, dst_gold, cv::COLOR_BGR2YCrCb);
 
-    EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, dst, depth == CV_32F ? 1e-2 : 1);
 }
 
 GPU_TEST_P(CvtColor, RGB2YCrCb)
@@ -728,7 +728,7 @@ GPU_TEST_P(CvtColor, RGB2YCrCb)
     cv::Mat dst_gold;
     cv::cvtColor(src, dst_gold, cv::COLOR_RGB2YCrCb);
 
-    EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, dst, depth == CV_32F ? 1e-2 : 1);
 }
 
 GPU_TEST_P(CvtColor, BGR2YCrCb4)
@@ -749,7 +749,7 @@ GPU_TEST_P(CvtColor, BGR2YCrCb4)
     cv::split(h_dst, channels);
     cv::merge(channels, 3, h_dst);
 
-    EXPECT_MAT_NEAR(dst_gold, h_dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, h_dst, depth == CV_32F ? 1e-2 : 1);
 }
 
 GPU_TEST_P(CvtColor, RGBA2YCrCb4)
@@ -771,7 +771,7 @@ GPU_TEST_P(CvtColor, RGBA2YCrCb4)
     cv::split(h_dst, channels);
     cv::merge(channels, 3, h_dst);
 
-    EXPECT_MAT_NEAR(dst_gold, h_dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, h_dst, depth == CV_32F ? 1e-2 : 1);
 }
 
 GPU_TEST_P(CvtColor, YCrCb2BGR)
@@ -840,7 +840,7 @@ GPU_TEST_P(CvtColor, YCrCb42RGBA)
     EXPECT_MAT_NEAR(dst_gold, dst, 1e-5);
 }
 
-GPU_TEST_P(CvtColor, DISABLED_BGR2HSV)
+GPU_TEST_P(CvtColor, BGR2HSV)
 {
     if (depth == CV_16U)
         return;
@@ -856,7 +856,7 @@ GPU_TEST_P(CvtColor, DISABLED_BGR2HSV)
     EXPECT_MAT_NEAR(dst_gold, dst, depth == CV_32F ? 1e-2 : 1);
 }
 
-GPU_TEST_P(CvtColor, DISABLED_RGB2HSV)
+GPU_TEST_P(CvtColor, RGB2HSV)
 {
     if (depth == CV_16U)
         return;
@@ -872,7 +872,7 @@ GPU_TEST_P(CvtColor, DISABLED_RGB2HSV)
     EXPECT_MAT_NEAR(dst_gold, dst, depth == CV_32F ? 1e-2 : 1);
 }
 
-GPU_TEST_P(CvtColor, DISABLED_RGB2HSV4)
+GPU_TEST_P(CvtColor, RGB2HSV4)
 {
     if (depth == CV_16U)
         return;
@@ -896,7 +896,7 @@ GPU_TEST_P(CvtColor, DISABLED_RGB2HSV4)
     EXPECT_MAT_NEAR(dst_gold, h_dst, depth == CV_32F ? 1e-2 : 1);
 }
 
-GPU_TEST_P(CvtColor, DISABLED_RGBA2HSV4)
+GPU_TEST_P(CvtColor, RGBA2HSV4)
 {
     if (depth == CV_16U)
         return;
diff --git a/modules/gpu/test/test_core.cpp b/modules/gpu/test/test_core.cpp
index 2f1bbd7b2..7ceeaedf0 100644
--- a/modules/gpu/test/test_core.cpp
+++ b/modules/gpu/test/test_core.cpp
@@ -422,7 +422,7 @@ PARAM_TEST_CASE(Subtract_Array, cv::gpu::DeviceInfo, cv::Size, std::pair<MatDept
     }
 };
 
-GPU_TEST_P(Subtract_Array, DISABLED_Accuracy)
+GPU_TEST_P(Subtract_Array, Accuracy)
 {
     cv::Mat mat1 = randomMat(size, stype);
     cv::Mat mat2 = randomMat(size, stype);
@@ -3582,7 +3582,7 @@ GPU_TEST_P(Normalize, WithOutMask)
     cv::Mat dst_gold;
     cv::normalize(src, dst_gold, alpha, beta, norm_type, type);
 
-    EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, dst, type < CV_32F ? 1.0 : 1e-4);
 }
 
 GPU_TEST_P(Normalize, WithMask)
@@ -3598,7 +3598,7 @@ GPU_TEST_P(Normalize, WithMask)
     dst_gold.setTo(cv::Scalar::all(0));
     cv::normalize(src, dst_gold, alpha, beta, norm_type, type, mask);
 
-    EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
+    EXPECT_MAT_NEAR(dst_gold, dst, type < CV_32F ? 1.0 : 1e-4);
 }
 
 INSTANTIATE_TEST_CASE_P(GPU_Core, Normalize, testing::Combine(
diff --git a/modules/gpu/test/test_gpumat.cpp b/modules/gpu/test/test_gpumat.cpp
index 210b6a441..fee264341 100644
--- a/modules/gpu/test/test_gpumat.cpp
+++ b/modules/gpu/test/test_gpumat.cpp
@@ -281,7 +281,7 @@ GPU_TEST_P(ConvertTo, WithOutScaling)
         cv::Mat dst_gold;
         src.convertTo(dst_gold, depth2);
 
-        EXPECT_MAT_NEAR(dst_gold, dst, 1.0);
+        EXPECT_MAT_NEAR(dst_gold, dst, depth2 < CV_32F ? 1.0 : 1e-4);
     }
 }
 
diff --git a/modules/gpu/test/test_hough.cpp b/modules/gpu/test/test_hough.cpp
index 6441fc69a..f876a7a2b 100644
--- a/modules/gpu/test/test_hough.cpp
+++ b/modules/gpu/test/test_hough.cpp
@@ -189,7 +189,7 @@ PARAM_TEST_CASE(GeneralizedHough, cv::gpu::DeviceInfo, UseRoi)
 {
 };
 
-GPU_TEST_P(GeneralizedHough, DISABLED_POSITION)
+GPU_TEST_P(GeneralizedHough, POSITION)
 {
     const cv::gpu::DeviceInfo devInfo = GET_PARAM(0);
     cv::gpu::setDevice(devInfo.deviceID());