diff --git a/tests/run.rbc b/tests/run.rbc
index a9b1673..82a5e72 100644
--- a/tests/run.rbc
+++ b/tests/run.rbc
@@ -53,7 +53,11 @@
 assert_eq(["from/a:to/a", "from/b:to/b"], rblf.product_copy_files_by_pattern("from/%", "to/%", "a b"))
 
 assert_eq([], rblf.filter(["a", "", "b"], "f"))
-assert_eq(["", "b"], rblf.filter_out(["a", "" ], ["a", "", "b"] ))
+assert_eq(["ab%c", "axyzb%c"], rblf.filter(["a%b%c"], ["ab%c", "axyzb%c", "axyzb%cd", "axyzbwc"]))
+assert_eq(["abc", "bcd"], rblf.filter(["a%", "b%"], ["abc", "def", "bcd", "xabc"]))
+assert_eq(["b", "ab"], rblf.filter_out(["a", "" ], ["a", "", "b", "ab"]))
+assert_eq(["c"], rblf.filter_out(["a", "b" ], ["a", "b", "c"]))
+assert_eq(["c"], rblf.filter_out(["a%", "b" ], ["abc", "b", "c"]))
 
 assert_eq("foo.c no_folder", rblf.notdir(["src/foo.c", "no_folder"]))
 assert_eq("foo.c no_folder", rblf.notdir("src/foo.c no_folder"))