diff --git a/tests/qemu-iotests/019 b/tests/qemu-iotests/019
index 4c82be2b52..a2d67c3269 100755
--- a/tests/qemu-iotests/019
+++ b/tests/qemu-iotests/019
@@ -92,7 +92,7 @@ mv $TEST_IMG $TEST_IMG.orig
 for backing_option in "-B $TEST_IMG.base" "-o backing_file=$TEST_IMG.base"; do
 
     echo
-    echo Testing conversion with $backing_option | _filter_testdir
+    echo Testing conversion with $backing_option | _filter_testdir | _filter_imgfmt
     echo
     $QEMU_IMG convert -O $IMGFMT $backing_option $TEST_IMG.orig $TEST_IMG
 
diff --git a/tests/qemu-iotests/019.out b/tests/qemu-iotests/019.out
index d3913dfea1..63bdd5474e 100644
--- a/tests/qemu-iotests/019.out
+++ b/tests/qemu-iotests/019.out
@@ -538,7 +538,7 @@ qemu-io> wrote 65536/65536 bytes at offset 4296146944
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 qemu-io> No errors were found on the image.
 
-Testing conversion with -B TEST_DIR/t.qcow2.base
+Testing conversion with -B TEST_DIR/t.IMGFMT.base
 
 Checking if backing clusters are allocated when they shouldn't
 
@@ -1082,7 +1082,7 @@ qemu-io> read 65536/65536 bytes at offset 4296343552
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 qemu-io> No errors were found on the image.
 
-Testing conversion with -o backing_file=TEST_DIR/t.qcow2.base
+Testing conversion with -o backing_file=TEST_DIR/t.IMGFMT.base
 
 Checking if backing clusters are allocated when they shouldn't
 
diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter
index da55f545a5..da77ede25f 100644
--- a/tests/qemu-iotests/common.filter
+++ b/tests/qemu-iotests/common.filter
@@ -128,12 +128,18 @@ _filter_date()
 	-e 's/[A-Z][a-z][a-z] [A-z][a-z][a-z]  *[0-9][0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/DATE/'
 }
 
-# replace occurances of the actual TEST_DIR value with TEST_DIR
+# replace occurrences of the actual TEST_DIR value with TEST_DIR
 _filter_testdir()
 {
     sed -e "s#$TEST_DIR#TEST_DIR#g"
 }
 
+# replace occurrences of the actual IMGFMT value with IMGFMT
+_filter_imgfmt()
+{
+    sed -e "s#$IMGFMT#IMGFMT#g"
+}
+
 # sanitize qemu-io output
 _filter_qemu_io()
 {