diff --git a/tests/fuzz/fuzz_client.c b/tests/fuzz/fuzz_client.c
index aee9946d9b..7860177a17 100644
--- a/tests/fuzz/fuzz_client.c
+++ b/tests/fuzz/fuzz_client.c
@@ -77,16 +77,16 @@ static int dummy_random( void *p_rng, unsigned char *output, size_t output_len )
 
 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 );
 }
 
 
diff --git a/tests/fuzz/fuzz_dtlsclient.c b/tests/fuzz/fuzz_dtlsclient.c
index b1465f06c3..c88b33b739 100644
--- a/tests/fuzz/fuzz_dtlsclient.c
+++ b/tests/fuzz/fuzz_dtlsclient.c
@@ -78,16 +78,16 @@ static int dummy_random( void *p_rng, unsigned char *output, size_t output_len )
 
 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 );
 }
 #endif
 
diff --git a/tests/fuzz/fuzz_dtlsserver.c b/tests/fuzz/fuzz_dtlsserver.c
index 23116aea0b..6e59a85a7c 100644
--- a/tests/fuzz/fuzz_dtlsserver.c
+++ b/tests/fuzz/fuzz_dtlsserver.c
@@ -79,16 +79,16 @@ static int dummy_random( void *p_rng, unsigned char *output, size_t output_len )
 
 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 );
 }
 #endif
 
diff --git a/tests/fuzz/fuzz_server.c b/tests/fuzz/fuzz_server.c
index 5a9510dda9..770a38633c 100644
--- a/tests/fuzz/fuzz_server.c
+++ b/tests/fuzz/fuzz_server.c
@@ -78,16 +78,16 @@ static int dummy_random( void *p_rng, unsigned char *output, size_t output_len )
 
 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 );
 }