diff --git a/TESTS/mbed_drivers/watchdog/main.cpp b/TESTS/mbed_drivers/watchdog/main.cpp
index 07502f3d77..9e73d346a0 100644
--- a/TESTS/mbed_drivers/watchdog/main.cpp
+++ b/TESTS/mbed_drivers/watchdog/main.cpp
@@ -14,11 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-#if !defined(MBED_CONF_RTOS_PRESENT)
-#error [NOT_SUPPORTED] Watchdog test cases require a RTOS to run.
-#else
-
 #if !DEVICE_WATCHDOG
 #error [NOT_SUPPORTED] Watchdog not supported for this target
 #else
@@ -275,4 +270,3 @@ int main()
 }
 
 #endif // !DEVICE_WATCHDOG
-#endif // !defined(MBED_CONG_RTOS_PRESENT)
diff --git a/TESTS/mbed_drivers/watchdog_reset/main.cpp b/TESTS/mbed_drivers/watchdog_reset/main.cpp
index e633e6d0b3..5ce319adfb 100644
--- a/TESTS/mbed_drivers/watchdog_reset/main.cpp
+++ b/TESTS/mbed_drivers/watchdog_reset/main.cpp
@@ -14,10 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if !defined(MBED_CONF_RTOS_PRESENT)
-#error [NOT_SUPPORTED] Watchdog reset test cases require a RTOS to run.
-#else
-
 #if !DEVICE_WATCHDOG
 #error [NOT_SUPPORTED] Watchdog not supported for this target
 #else
@@ -342,4 +338,3 @@ int main()
     return !Harness::run(specification);
 }
 #endif // !DEVICE_WATCHDOG
-#endif // !defined(MBED_CONF_RTOS_PRESENT)
diff --git a/TESTS/mbed_hal/watchdog/main.cpp b/TESTS/mbed_hal/watchdog/main.cpp
index 8504da581c..e77d38edd3 100644
--- a/TESTS/mbed_hal/watchdog/main.cpp
+++ b/TESTS/mbed_hal/watchdog/main.cpp
@@ -14,10 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if !defined(MBED_CONF_RTOS_PRESENT)
-#error [NOT_SUPPORTED] Watchdog test cases require a RTOS to run.
-#else
-
 #if !DEVICE_WATCHDOG
 #error [NOT_SUPPORTED] Watchdog not supported for this target
 #else
@@ -274,5 +270,4 @@ int main()
     return !Harness::run(specification);
 }
 
-#endif // !DEVICE_WATCHDOG
-#endif // !defined(MBED_CONF_RTOS_PRESENT)
+#endif // !DEVICE_WATCHDOG
\ No newline at end of file
diff --git a/TESTS/mbed_hal/watchdog_reset/main.cpp b/TESTS/mbed_hal/watchdog_reset/main.cpp
index 8d1c28e30a..a909474e49 100644
--- a/TESTS/mbed_hal/watchdog_reset/main.cpp
+++ b/TESTS/mbed_hal/watchdog_reset/main.cpp
@@ -14,10 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#if !MBED_CONF_RTOS_PRESENT
-#error [NOT_SUPPORTED] Watchdog reset test cases require a RTOS to run.
-#else
-
 #if !DEVICE_WATCHDOG
 #error [NOT_SUPPORTED] Watchdog not supported for this target
 #else
@@ -329,4 +325,3 @@ int main()
 }
 
 #endif // !DEVICE_WATCHDOG
-#endif // !MBED_CONF_RTOS_PRESENT