diff --git a/tools/filters/grep.xml b/tools/filters/grep.xml
index ba65f014a75..b39680f93df 100644
--- a/tools/filters/grep.xml
+++ b/tools/filters/grep.xml
@@ -51,9 +51,21 @@
       <param name="invert" value=""/>
       <param name="pattern" value="+"/>
       <param name="keep_header" value="true"/>
+      <output name="out_file1">
+        <assert_contents>
+          <has_text text="CCDS989.1_cds_0_0_chr1_147962193_r"/>
+          <not_has_text text="CCDS993.1_cds_0_0_chr1_148078401_r"/>
+        </assert_contents>
+      </output>
+    </test>
+    <test>
+      <param name="input" value="1.bed"/>
+      <param name="invert" value=""/>
+      <param name="pattern" value="+"/>
       <output name="out_file1">
         <assert_contents>
           <not_has_text text="CCDS989.1_cds_0_0_chr1_147962193_r"/>
+          <not_has_text text="CCDS993.1_cds_0_0_chr1_148078401_r"/>
         </assert_contents>
       </output>
     </test>