diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index b3349546d..4c095d3c9 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -206,7 +206,7 @@ static int rnd_pseudo_rand( void *rng_state, unsigned char *output, size_t len )
 {
     rnd_pseudo_info *info = (rnd_pseudo_info *) rng_state;
     uint32_t i, *k, sum, delta=0x9E3779B9;
-    unsigned char result[4];
+    unsigned char result[4], *out = output;
 
     if( rng_state == NULL )
         return( rnd_std_rand( NULL, output, len ) );
@@ -226,8 +226,9 @@ static int rnd_pseudo_rand( void *rng_state, unsigned char *output, size_t len )
         }
 
         PUT_UINT32_BE( info->v0, result, 0 );
-        memcpy( output, result, use_len );
+        memcpy( out, result, use_len );
         len -= use_len;
+        out += 4;
     }
 
     return( 0 );