diff --git a/tests/periph_gpio/main.c b/tests/periph_gpio/main.c
index 1ea711c2a9..c0939944d5 100644
--- a/tests/periph_gpio/main.c
+++ b/tests/periph_gpio/main.c
@@ -253,9 +253,9 @@ int main(void)
     /* start the shell */
 #ifndef MODULE_NEWLIB
     (void) posix_open(uart0_handler_pid, 0);
-    shell_init(&shell, NULL, SHELL_BUFSIZE, uart0_readc, uart0_putc);
+    shell_init(&shell, shell_commands, SHELL_BUFSIZE, uart0_readc, uart0_putc);
 #else
-    shell_init(&shell, NULL, SHELL_BUFSIZE, getchar, putchar);
+    shell_init(&shell, shell_commands, SHELL_BUFSIZE, getchar, putchar);
 #endif
     shell_run(&shell);