diff --git a/tests/suites/test_suite_platform.data b/tests/suites/test_suite_platform.data
index 39b423f3dd..4276b8fb77 100644
--- a/tests/suites/test_suite_platform.data
+++ b/tests/suites/test_suite_platform.data
@@ -4,6 +4,3 @@ time_get_milliseconds:
 
 Time: get seconds
 time_get_seconds:
-
-Time: delay milliseconds
-time_delay_milliseconds:1000
diff --git a/tests/suites/test_suite_platform.function b/tests/suites/test_suite_platform.function
index 7453c32c9c..6ae1026780 100644
--- a/tests/suites/test_suite_platform.function
+++ b/tests/suites/test_suite_platform.function
@@ -64,6 +64,13 @@ void time_delay_milliseconds(int delay_ms)
     mbedtls_ms_time_t current = mbedtls_ms_time();
     mbedtls_ms_time_t elapsed_ms;
 
+    /*
+     * WARNING: DO NOT ENABLE THIS TEST. We keep the code here to document the
+     *          reason.
+     *
+     *          Windows CI reports random test fail on platform-suite. It might
+     *          be caused by this case.
+     */
     sleep_ms(delay_ms);
 
     elapsed_ms = mbedtls_ms_time() - current;