diff --git a/test/gmtconvert/strings.txt b/test/gmtconvert/strings.txt
index deca4aeef08..66f480c3ba0 100644
--- a/test/gmtconvert/strings.txt
+++ b/test/gmtconvert/strings.txt
@@ -11,6 +11,8 @@ nbnidf			|STRING
 55.cip			|STRING
 55.dms			|STRING
 -44.8cm			|STRING
+255/255/255		|STRING
+13/13/13		|STRING
 # Test for the FLOAT detector:
 -33.56			|FLOAT
 -0.8e+04		|FLOAT
@@ -35,17 +37,18 @@ nbnidf			|STRING
 12/16/2022T		|ABSTIME
 7654/11/31T22:23:24.07	|ABSTIME
 # Test for the LONGITUDE detector:
--33:45.8		|GEOGRAPHIC
 -355:16:44		|LONGITUDE
 -355:16:44.45454	|LONGITUDE
 33:45.8W		|LONGITUDE
 355:16:44E		|LONGITUDE
 355:16:44.45454W	|LONGITUDE
+95:00:00		|LONGITUDE
 # Test for the LATITUDE detector:
 33:45.8S		|LATITUDE
 55:16:44N		|LATITUDE
 55:16:44.45454S		|LATITUDE
 # Test for the GEOGRAPHIC detector:
+-33:45.8		|GEOGRAPHIC
 -35:16:44.45454		|GEOGRAPHIC
 -33:45.8		|GEOGRAPHIC
 75:45:55		|GEOGRAPHIC