.gitignore    | 1 +
 pe_test.go    | 5 +++++
 validators.go | 2 +-

diff --git a/.gitignore b/.gitignore
index 3f008b903ed66583bde37615fbaafd027897feee..7097f7f63a98ee07abc216b5fc7bceb4d7f86beb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 pe
 *.txt
 demo.gif
+path-extractor
diff --git a/pe_test.go b/pe_test.go
index 6545029a9c379c20334858f8ae1dafb506c23793..cc8ef4d98ffa172a79e2e247fa28c5fb4b8f901c 100644
--- a/pe_test.go
+++ b/pe_test.go
@@ -18,6 +18,11 @@ 	if len(output) != 0 {
 		t.Errorf("Matches email adresses", output[0])
 	}
 
+	output = GetAllMatches("and/or")
+	if len(output) != 0 {
+		t.Errorf("Matches and/or adresses", output[0])
+	}
+
 	output = GetAllMatches("v1.2")
 	if len(output) != 0 {
 		t.Errorf("Matches version number", output[0])
diff --git a/validators.go b/validators.go
index cd9477dc64acd28b5cfde017ecb25ef3ec6af713..cb09c4035ccb8b00c72bfce3e53a8f7e759e3525 100644
--- a/validators.go
+++ b/validators.go
@@ -38,7 +38,7 @@ 	return r.Match([]byte(input))
 }
 
 func containsInvalidString(input string) bool {
-	invalidStrings := []string{"(", ")", "@", "origin/", "{", "}", "<", ">", "$", "*"}
+	invalidStrings := []string{"(", ")", "@", "and/or", "origin/", "{", "}", "<", ">", "$", "*"}
 	for _, s := range invalidStrings {
 		if strings.Contains(input, s) {
 			return true