diff --git a/libswscale/swscale-test.c b/libswscale/swscale-test.c
index a812ee5963..887973a40e 100644
--- a/libswscale/swscale-test.c
+++ b/libswscale/swscale-test.c
@@ -106,9 +106,9 @@ static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
          * prefer, as long as they're aligned enough for the architecture, and
          * they're freed appropriately (such as using av_free for buffers
          * allocated with av_malloc). */
-        src[i]= av_malloc(srcStride[i]*srcH);
-        dst[i]= av_malloc(dstStride[i]*dstH);
-        out[i]= av_malloc(refStride[i]*h);
+        src[i]= av_mallocz(srcStride[i]*srcH);
+        dst[i]= av_mallocz(dstStride[i]*dstH);
+        out[i]= av_mallocz(refStride[i]*h);
         if (!src[i] || !dst[i] || !out[i]) {
             perror("Malloc");
             res = -1;