diff --git a/tests/include/test/ssl_helpers.h b/tests/include/test/ssl_helpers.h
index 1957043831..f997c1864e 100644
--- a/tests/include/test/ssl_helpers.h
+++ b/tests/include/test/ssl_helpers.h
@@ -456,6 +456,12 @@ int mbedtls_test_move_handshake_to_state(mbedtls_ssl_context *ssl,
         }                                       \
     } while (0)
 
+#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX
+#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_IN_LEN_MAX
+#else
+#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_OUT_LEN_MAX
+#endif
+
 int mbedtls_test_ssl_build_transforms(mbedtls_ssl_transform *t_in,
                                       mbedtls_ssl_transform *t_out,
                                       int cipher_type, int hash_id,
diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index b7a7e86eec..1f8ba1e42a 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -921,12 +921,6 @@ int psk_dummy_callback(void *p_info, mbedtls_ssl_context *ssl,
     return 0;
 }
 
-#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX
-#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_IN_LEN_MAX
-#else
-#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_OUT_LEN_MAX
-#endif
-
 int mbedtls_test_ssl_build_transforms(mbedtls_ssl_transform *t_in,
                                       mbedtls_ssl_transform *t_out,
                                       int cipher_type, int hash_id,