Clean up details in ctr_drbg_selftest()
diff --git a/tests/suites/test_suite_ctr_drbg.data b/tests/suites/test_suite_ctr_drbg.data
index b09679c..6120bb0 100644
--- a/tests/suites/test_suite_ctr_drbg.data
+++ b/tests/suites/test_suite_ctr_drbg.data
@@ -718,3 +718,6 @@
 CTR_DRBG NIST Validation (AES-256 use df,False,256,128,256,256) #14
 ctr_drbg_validate_nopr:"50de72903b9d99764123ffaa0c721e14ad1ab5c46a34c040f25324ba1d937b8ef10467161fcf2978c2a680ac5570c6d2":"5c9954fd0143e62c3bf2d5734052e3c9370f7b9d75c70f58fe33b12e3997ee2c8db84f8467affd7cfd9a9e7ec60da6f31bf9bf32aedf644e4934bd1fc916bc8d":"d5dc4c9fc7171fcbfdaead558a565ffd55d245a58b22ad1666ee05131e33f49e":"ea3114e92e6a19f53b207a0a54cd363a6d053fed0a827f92556f0a8580f7a342":"53686f069b455af4692888d11fac15cf7b4bd38e198de4e62b7098f875198a75":"9fb0df053e0345e5640aa97fedef50a6"
 
+CTR_DRBG self test
+ctr_drbg_selftest:
+
diff --git a/tests/suites/test_suite_ctr_drbg.function b/tests/suites/test_suite_ctr_drbg.function
index 7cdd2e1..1ae763d 100644
--- a/tests/suites/test_suite_ctr_drbg.function
+++ b/tests/suites/test_suite_ctr_drbg.function
@@ -81,3 +81,10 @@
     TEST_ASSERT( strcmp( (char *) output_str, result_str ) == 0 );
 }
 /* END_CASE */
+
+/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */
+void ctr_drbg_selftest( )
+{
+    TEST_ASSERT( ctr_drbg_self_test( 0 ) == 0 );
+}
+/* END_CASE */