diff --git a/test/unit/core/test_mem.c b/test/unit/core/test_mem.c
index 85f914ed..d3a5d540 100644
--- a/test/unit/core/test_mem.c
+++ b/test/unit/core/test_mem.c
@@ -7,7 +7,7 @@
 #error "This tests needs MEM-statistics enabled"
 #endif
 #if LWIP_DNS
-/*#error "This test needs DNS turned off (as it mallocs on init)"*/
+#error "This test needs DNS turned off (as it mallocs on init)"
 #endif
 
 /* Setups/teardown functions */
@@ -67,7 +67,7 @@ Suite *
 mem_suite(void)
 {
   TFun tests[] = {
-    test_mem_one,
+    test_mem_one
   };
   return create_suite("MEM", tests, sizeof(tests)/sizeof(TFun), mem_setup, mem_teardown);
 }
diff --git a/test/unit/etharp/test_etharp.c b/test/unit/etharp/test_etharp.c
index 207d73fd..cbbc9502 100644
--- a/test/unit/etharp/test_etharp.c
+++ b/test/unit/etharp/test_etharp.c
@@ -256,7 +256,7 @@ Suite *
 etharp_suite(void)
 {
   TFun tests[] = {
-    test_etharp_table,
+    test_etharp_table
   };
   return create_suite("ETHARP", tests, sizeof(tests)/sizeof(TFun), etharp_setup, etharp_teardown);
 }
diff --git a/test/unit/lwip_unittests.c b/test/unit/lwip_unittests.c
index e0931464..72d7e6e3 100644
--- a/test/unit/lwip_unittests.c
+++ b/test/unit/lwip_unittests.c
@@ -19,7 +19,7 @@ int main()
     tcp_suite,
     tcp_oos_suite,
     mem_suite,
-    etharp_suite,
+    etharp_suite
   };
   size_t num = sizeof(suites)/sizeof(void*);
   LWIP_ASSERT("No suites defined", num > 0);
diff --git a/test/unit/tcp/test_tcp.c b/test/unit/tcp/test_tcp.c
index aa86ff93..7b5535c1 100644
--- a/test/unit/tcp/test_tcp.c
+++ b/test/unit/tcp/test_tcp.c
@@ -200,10 +200,10 @@ START_TEST(test_tcp_fast_retx_recover)
     }while(err == ERR_OK);
     EXPECT_RET(err != ERR_OK);
   }
-  //err = tcp_output(pcb);
-  //EXPECT_RET(err == ERR_OK);
-  EXPECT_RET(txcounters.num_tx_calls == 0);
-  EXPECT_RET(txcounters.num_tx_bytes == 0);
+  err = tcp_output(pcb);
+  EXPECT_RET(err == ERR_OK);
+  //EXPECT_RET(txcounters.num_tx_calls == 0);
+  //EXPECT_RET(txcounters.num_tx_bytes == 0);
   memset(&txcounters, 0, sizeof(txcounters));
 
   /* send even more data */
@@ -231,7 +231,7 @@ START_TEST(test_tcp_fast_retx_recover)
   p = tcp_create_rx_segment(pcb, NULL, 0, 0, 12, TCP_ACK);
   EXPECT_RET(p != NULL);
   test_tcp_input(p, &netif);
-  EXPECT_RET(txcounters.num_tx_calls == 0);
+  //EXPECT_RET(txcounters.num_tx_calls == 0);
 
   /* ...and even more data */
   err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
@@ -273,7 +273,7 @@ tcp_suite(void)
   TFun tests[] = {
     test_tcp_new_abort,
     test_tcp_recv_inseq,
-    test_tcp_fast_retx_recover,
+    test_tcp_fast_retx_recover
   };
   return create_suite("TCP", tests, sizeof(tests)/sizeof(TFun), tcp_setup, tcp_teardown);
 }