diff --git a/xCAT-test/autotest/testcase/tabgrep/cases0 b/xCAT-test/autotest/testcase/tabgrep/cases0
index 232fae50c..b0c2d8cbb 100644
--- a/xCAT-test/autotest/testcase/tabgrep/cases0
+++ b/xCAT-test/autotest/testcase/tabgrep/cases0
@@ -1,3 +1,22 @@
+start:tabgrep_null
+description: tabgrep with no argument
+cmd:tabgrep
+check:output=~Usage
+end
+
+
+
+start:tabgrep_h
+description:tabgrep -h an d -? and --help
+cmd:tabgrep -h
+check:output=~Usage
+cmd:tabgrep -?
+check:output=~Usage
+cmd:tabgrep --help
+check:output=~Usage
+end
+
+
 start:tabgrep_node
 cmd:mkdef -t node testnode groups=all
 check:rc==0
@@ -6,3 +25,12 @@ check:rc==0
 check:output=~nodelist
 cmd:rmdef -t node testnode
 end
+
+
+start:tabgrep_err
+description:tabgrep with error noderange
+cmd:rmdef -t node testnode
+cmd:tabgrep testnode
+check:rc!=0
+check:output=~Invalid nodes and/or groups in noderange: testnode
+end