diff --git a/tests/src/string/trim.c b/tests/src/string/trim.c
index a320ce8..4111e50 100644
--- a/tests/src/string/trim.c
+++ b/tests/src/string/trim.c
@@ -3,18 +3,27 @@
 
 #include "plug.h"
 
+
 int main(int argc, char** argv) {
     test_init(argc, argv);
     vtype_string x;
+    int c = random_unicode_symbol();
 
     x = string_random(12);
 
     string_align_center(&x, 30, 0);
-
     string_print(&x, 0);
 
-    string_trim(&x, 0);
+    string_trim_spaces(&x);
     string_print(&x, 0);
 
+
+    string_align_center(&x, 30, c);
+    string_print(&x, 0);
+
+    string_trim(&x, c);
+    string_print(&x, 0);
+
+
     string_free(&x);
 }