diff --git a/modules/core/test/test_arithm.cpp b/modules/core/test/test_arithm.cpp
index 4a9522d3d1..014a0cff0a 100644
--- a/modules/core/test/test_arithm.cpp
+++ b/modules/core/test/test_arithm.cpp
@@ -1390,7 +1390,8 @@ struct MinMaxLocOp : public BaseElemWiseOp
 
 struct reduceArgMinMaxOp : public BaseElemWiseOp
 {
-    reduceArgMinMaxOp() : BaseElemWiseOp(1, FIX_ALPHA+FIX_BETA+FIX_GAMMA, 1, 1, Scalar::all(0))
+    reduceArgMinMaxOp() : BaseElemWiseOp(1, FIX_ALPHA+FIX_BETA+FIX_GAMMA, 1, 1, Scalar::all(0)),
+                          isLast(false), isMax(false), axis(0)
     {
         context = ARITHM_MAX_NDIMS*2 + 2;
     };