diff --git a/esvapi.d b/esvapi.d
index 3809273..294e1a6 100644
--- a/esvapi.d
+++ b/esvapi.d
@@ -170,6 +170,14 @@ verseValid(in char[] verse)
 	return false;
 }
 
+@safe unittest
+{
+	assert(verseValid("1"));
+	assert(verseValid("5-7"));
+	assert(verseValid("15:13"));
+	assert(verseValid("15:12-17"));
+}
+
 /++
  + Structure containing the authentication key, API URL,
  + any parameters to use when making a request as well as the