diff --git a/tests/suites/test_suite_platform.data b/tests/suites/test_suite_platform.data
index 689aa57e37..557b586eb6 100644
--- a/tests/suites/test_suite_platform.data
+++ b/tests/suites/test_suite_platform.data
@@ -6,7 +6,7 @@ Time: get seconds
 time_get_seconds:
 
 Time: delay milliseconds
-time_delay_milliseconds:100
+time_delay_milliseconds:1000
 
 Time: delay seconds
 time_delay_seconds:1
diff --git a/tests/suites/test_suite_platform.function b/tests/suites/test_suite_platform.function
index cf0a785fe1..54ddd42c3c 100644
--- a/tests/suites/test_suite_platform.function
+++ b/tests/suites/test_suite_platform.function
@@ -69,7 +69,7 @@ void time_delay_milliseconds(int delay_ms)
     sleep_ms(delay_ms);
 
     elapsed_ms = mbedtls_ms_time() - current;
-    TEST_ASSERT(elapsed_ms >= delay_ms && elapsed_ms < 500 + delay_ms);
+    TEST_ASSERT(elapsed_ms >= delay_ms && elapsed_ms < 4000 + delay_ms);
     /* This goto is added to avoid warnings from the generated code. */
     goto exit;
 }