diff --git a/test/test-ref.c b/test/test-ref.c
index 9a474b56..cab3a703 100644
--- a/test/test-ref.c
+++ b/test/test-ref.c
@@ -45,7 +45,7 @@ static void write_unref_cb(uv_connect_t* req, int status) {
   ASSERT(status == 0);
 
   uv_write(&write_req, req->handle, &buf, 1, (uv_write_cb) fail_cb);
-  uv_unref(uv_default_loop()); // uv_write refs the loop
+  uv_unref(uv_default_loop()); /* uv_write refs the loop */
 }
 
 
@@ -55,7 +55,7 @@ static void shutdown_unref_cb(uv_connect_t* req, int status) {
   ASSERT(status == 0);
 
   uv_shutdown(&shutdown_req, req->handle, (uv_shutdown_cb) fail_cb);
-  uv_unref(uv_default_loop()); // uv_shutdown refs the loop
+  uv_unref(uv_default_loop()); /* uv_shutdown refs the loop */
 }
 
 
diff --git a/test/test-tty.c b/test/test-tty.c
index 24f0def6..ded59c9f 100644
--- a/test/test-tty.c
+++ b/test/test-tty.c
@@ -25,7 +25,7 @@
 #ifdef _WIN32
 # include <io.h>
 # include <windows.h>
-#else // Unix
+#else /*  Unix */
 # include <fcntl.h>
 # include <unistd.h>
 #endif
@@ -37,7 +37,7 @@ TEST_IMPL(tty) {
   uv_tty_t tty_in, tty_out;
   uv_loop_t* loop = uv_default_loop();
 
-  // Make sure we have an FD that refers to a tty
+  /* Make sure we have an FD that refers to a tty */
 #ifdef _WIN32
   HANDLE handle;
   handle = CreateFileA("conin$",