diff --git a/tests/fuzz/fuzz_server.c b/tests/fuzz/fuzz_server.c
index 5a9510d..770a386 100644
--- a/tests/fuzz/fuzz_server.c
+++ b/tests/fuzz/fuzz_server.c
@@ -78,16 +78,16 @@
 
 static int dummy_entropy( void *data, unsigned char *output, size_t len )
 {
-    int ret;
     size_t i;
 
     //use mbedtls_entropy_func to find bugs in it
-    ret = mbedtls_entropy_func(data, output, len);
+    //test performance impact of entropy
+    //ret = mbedtls_entropy_func(data, output, len);
     for (i=0; i<len; i++) {
         //replace result with pseudo random
         output[i] = (unsigned char) random();
     }
-    return( ret );
+    return( 0 );
 }