diff --git a/modules/calib3d/test/test_solvepnp_ransac.cpp b/modules/calib3d/test/test_solvepnp_ransac.cpp
index 5bd2a37ca1..b3a8c56e3f 100644
--- a/modules/calib3d/test/test_solvepnp_ransac.cpp
+++ b/modules/calib3d/test/test_solvepnp_ransac.cpp
@@ -344,7 +344,11 @@ protected:
             }
         }
 
-        solvePnPRansac(points, projectedPoints, intrinsics, distCoeffs, rvec, tvec, false, pointsCount, 0.5f, 0.99, inliers, method);
+        bool isEstimateSuccess = solvePnPRansac(points, projectedPoints, intrinsics, distCoeffs, rvec, tvec, false, pointsCount, 0.5f, 0.99, inliers, method);
+        if (!isEstimateSuccess)
+        {
+            return false;
+        }
 
         bool isTestSuccess = inliers.size() + numOutliers >= points.size();
 
diff --git a/modules/imgproc/test/test_cornersubpix.cpp b/modules/imgproc/test/test_cornersubpix.cpp
index 5a2e633397..eebd76afea 100644
--- a/modules/imgproc/test/test_cornersubpix.cpp
+++ b/modules/imgproc/test/test_cornersubpix.cpp
@@ -69,6 +69,8 @@ TEST(Imgproc_CornerSubPix, out_of_image_corners)
 TEST(Imgproc_CornerSubPix, corners_on_the_edge)
 {
     cv::Mat image(500, 500, CV_8UC1);
+    RNG& rng = TS::ptr()->get_rng();
+    cvtest::randUni(rng, image, 0, 255);
     cv::Size win(1, 1);
     cv::Size zeroZone(-1, -1);
     cv::TermCriteria criteria;