diff --git a/tests/base/mp_filtercheck.test.sas b/tests/base/mp_filtercheck.test.sas
index b1e07e0..b948cb4 100644
--- a/tests/base/mp_filtercheck.test.sas
+++ b/tests/base/mp_filtercheck.test.sas
@@ -52,6 +52,8 @@ AND,OR,2,Weight,NE,77.7
 AND,AND,1,age,=,.A
 AND,AND,1,height,<,.B
 AND,AND,1,age,IN,"(.a,.b,.)"
+AND,AND,1,age,IN,"(.A)"
+
 ;;;;
 run;
 
diff --git a/tests/base/mp_filterstore.test.1.sas b/tests/base/mp_filterstore.test.1.sas
index 49808e1..7df9f57 100644
--- a/tests/base/mp_filterstore.test.1.sas
+++ b/tests/base/mp_filterstore.test.1.sas
@@ -56,6 +56,9 @@ AND,AND,1,SEX,<=,"'M'"
 AND,OR,2,Name,NOT IN,"('Jane','Alfred')"
 AND,OR,2,Weight,>=,77.7
 AND,OR,2,Weight,NE,77.7
+AND,AND,3,age,NOT IN,"(.a,.b,.)"
+AND,AND,3,age,NOT IN,"(.A)"
+AND,AND,4,Name,=,"'Jeremiah'"
 ;;;;
 run;