diff --git a/Tests/src/custom_classic.txt b/Tests/src/custom_ruleset/classic.txt
similarity index 100%
rename from Tests/src/custom_classic.txt
rename to Tests/src/custom_ruleset/classic.txt
diff --git a/Tests/src/custom_domain.txt b/Tests/src/custom_ruleset/domain.txt
similarity index 100%
rename from Tests/src/custom_domain.txt
rename to Tests/src/custom_ruleset/domain.txt
diff --git a/Tests/src/custom_ip.txt b/Tests/src/custom_ruleset/ipcidr.txt
similarity index 100%
rename from Tests/src/custom_ip.txt
rename to Tests/src/custom_ruleset/ipcidr.txt
diff --git a/Tests/src/patch/patch.txt b/Tests/src/patch/patch.txt
new file mode 100644
index 0000000..b802cf9
--- /dev/null
+++ b/Tests/src/patch/patch.txt
@@ -0,0 +1,2 @@
+ADD:.example.com
+REM:example.com
\ No newline at end of file
diff --git a/Tests/test_2_utils.py b/Tests/test_2_utils.py
index bef0244..ea43496 100644
--- a/Tests/test_2_utils.py
+++ b/Tests/test_2_utils.py
@@ -24,16 +24,22 @@ def test_is_domain(self):
         assert not rule.is_domain(ipv4addr)
 
     def test_custom_convert(self):
-        test_src_path = Path("./src/")
-        test_conv_ruleset = rule.custom_convert(test_src_path/"custom_domain.txt")
+        test_src_path = Path("./src/custom_ruleset/")
+        test_conv_ruleset = rule.custom_convert(test_src_path/"domain.txt")
         assert test_conv_ruleset == rule.RuleSet("Domain",
                                                  [rule.Rule("DomainSuffix", "example.com"),
                                                   rule.Rule("DomainFull", "example.com")])
 
-        test_conv_ruleset = rule.custom_convert(test_src_path/"custom_ip.txt")
+        test_conv_ruleset = rule.custom_convert(test_src_path/"ipcidr.txt")
         assert test_conv_ruleset == rule.RuleSet("IPCIDR",
                                                  [rule.Rule("IPCIDR", "11.4.5.14"),])
 
-        test_conv_ruleset = rule.custom_convert(test_src_path/"custom_classic.txt")
+        test_conv_ruleset = rule.custom_convert(test_src_path/"classic.txt")
         assert test_conv_ruleset == rule.RuleSet("Classical",
                                                  [rule.Rule("Classical", "DOMAIN,example.com")])
+
+    def test_patch(self):
+        test_src_patch = Path("./src/patch/")
+        test_ruleset = rule.RuleSet("Domain", [rule.Rule("DomainFull", "example.com")])
+        rule.apply_patch(test_ruleset, "patch", test_src_patch)
+        assert test_ruleset == rule.RuleSet("Domain", [rule.Rule("DomainSuffix", "example.com")])