diff --git a/lib/galaxy/datatypes/converters/interval_to_bgzip_converter.xml b/lib/galaxy/datatypes/converters/interval_to_bgzip_converter.xml
index 52e1e8d7b98f..fe1df3514d19 100644
--- a/lib/galaxy/datatypes/converters/interval_to_bgzip_converter.xml
+++ b/lib/galaxy/datatypes/converters/interval_to_bgzip_converter.xml
@@ -41,7 +41,7 @@
         <test>
             <param name="input1" ftype="bed" value="droPer1.bed"/>
             <output name="output1" ftype="bgzip" value="droPer1.bgzip" decompress="true">
-                <expand macro="assert_size" value="131"/>
+                <expand macro="assert_size" value="120"/>
             </output>
             <assert_command>
                 <has_text text="-k1,1 -k2,2n -k3,3n"/>
@@ -49,7 +49,7 @@
         </test>
         <test>
             <param name="input1" ftype="encodepeak" value="encode.broad.peak"/>
-            <output name="output1" ftype="bgzip">
+            <output name="output1" ftype="bgzip" decompress="true">
                 <expand macro="assert_size" value="143">
                     <has_text_matching expression="^#" negate="true"/>
                 </expand>
@@ -61,7 +61,7 @@
         <test>
             <param name="input1" ftype="gff" value="gff_filter_by_feature_count_out2.gff"/>
             <output name="output1" ftype="bgzip" value="bgzip_filter_by_feature_count_out2.bgzip" decompress="true">
-                <expand macro="assert_size" value="638"/>
+                <expand macro="assert_size" value="3824"/>
             </output>
             <assert_command>
                 <has_text text="-k1,1 -k4,4n"/>
@@ -71,7 +71,7 @@
         <test>
             <param name="input1" ftype="interval" value="2.interval"/>
             <output name="output1" ftype="bgzip" value="2.bgzip" decompress="true">
-                <expand macro="assert_size" value="208"/>
+                <expand macro="assert_size" value="501"/>
             </output>
             <assert_command>
                 <has_text text="-k1,1 -k2,2n -k3,3n"/>
@@ -80,10 +80,9 @@
         <test>
             <param name="input1" ftype="vcf" value="vcf_to_maf_in.vcf"/>
             <output name="output1" ftype="bgzip" decompress="true">
-                <expand macro="assert_size" value="322">
-                    <!-- will only work with https://github.com/galaxyproject/galaxy/pull/15085
-                        <has_n_lines n="3"/>
-                        <has_text_matching expression="^#" negate="true"/> -->
+                <expand macro="assert_size" value="507">
+                    <has_n_lines n="5"/>
+                    <has_text_matching expression="^#" negate="true"/>
                 </expand>
             </output>
             <assert_command>
@@ -92,9 +91,9 @@
         </test>
         <test>
             <param name="input1" ftype="gtf" value="cufflinks_out1.gtf"/>
-            <output name="output1" ftype="bgzip" >
+            <output name="output1" ftype="bgzip" decompress="true">
                 <assert_contents>
-                    <has_size value="270" delta="10" />
+                    <has_size value="887"/>
                 </assert_contents>
             </output>
             <assert_command>
diff --git a/lib/galaxy/datatypes/converters/vcf_to_vcf_bgzip_converter.xml b/lib/galaxy/datatypes/converters/vcf_to_vcf_bgzip_converter.xml
index 41617707e2b9..f6ebadcf1d34 100644
--- a/lib/galaxy/datatypes/converters/vcf_to_vcf_bgzip_converter.xml
+++ b/lib/galaxy/datatypes/converters/vcf_to_vcf_bgzip_converter.xml
@@ -17,7 +17,7 @@
             <param name="input1" ftype="vcf" value="vcf_to_maf_in.vcf"/>
             <output name="output1" ftype="vcf_bgzip" value="vcf_bgzip_to_maf_in.vcf_bgzip" decompress="true">
                 <assert_contents>
-                    <has_size value="717" delta="10"/>
+                    <has_size value="1182"/>
                 </assert_contents>
             </output>
         </test>