diff --git a/tests/cv/src/acornerssubpix.cpp b/tests/cv/src/acornerssubpix.cpp
index 8cbf912e31..698e41ad22 100644
--- a/tests/cv/src/acornerssubpix.cpp
+++ b/tests/cv/src/acornerssubpix.cpp
@@ -202,7 +202,8 @@ void CV_ChessboardSubpixelTest::run( int )
         sum_dist += dist2;
         count++;
         
-        if(dist1 < dist2)
+        const double max_reduce_factor = 0.8;
+        if(dist1 < dist2*max_reduce_factor)
         {
             ts->printf(CvTS::LOG, "findCornerSubPix increases average error!\n");
             code = CvTS::FAIL_INVALID_OUTPUT;