diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c
index c7421c55de..c28a23e332 100644
--- a/tests/virstoragetest.c
+++ b/tests/virstoragetest.c
@@ -184,6 +184,7 @@ testStorageChain(const void *args)
         virBufferAsprintf(&buf,
                           "path:%s\n"
                           "backingStoreRaw: %s\n"
+                          "backingStoreRawFormat: %s(%d)\n"
                           "capacity: %lld\n"
                           "encryption: %d\n"
                           "relPath:%s\n"
@@ -193,6 +194,8 @@ testStorageChain(const void *args)
                           "hostname:%s\n\n",
                           strippedPath,
                           strippedBackingStoreRaw,
+                          NULLSTR(virStorageFileFormatTypeToString(elt->backingStoreRawFormat)),
+                          elt->backingStoreRawFormat,
                           elt->capacity,
                           !!elt->encryption,
                           strippedRelPath,
diff --git a/tests/virstoragetestdata/out/directory-dir b/tests/virstoragetestdata/out/directory-dir
index 298c6cfb4a..c6a2fa3673 100644
--- a/tests/virstoragetestdata/out/directory-dir
+++ b/tests/virstoragetestdata/out/directory-dir
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/directory-none b/tests/virstoragetestdata/out/directory-none
index 298c6cfb4a..c6a2fa3673 100644
--- a/tests/virstoragetestdata/out/directory-none
+++ b/tests/virstoragetestdata/out/directory-none
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/directory-raw b/tests/virstoragetestdata/out/directory-raw
index 42589746b8..6e190c97f4 100644
--- a/tests/virstoragetestdata/out/directory-raw
+++ b/tests/virstoragetestdata/out/directory-raw
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qcow2-auto_qcow2-qcow2_raw-raw b/tests/virstoragetestdata/out/qcow2-auto_qcow2-qcow2_raw-raw
index 7c299542a4..0540be0c09 100644
--- a/tests/virstoragetestdata/out/qcow2-auto_qcow2-qcow2_raw-raw
+++ b/tests/virstoragetestdata/out/qcow2-auto_qcow2-qcow2_raw-raw
@@ -1,5 +1,6 @@
 path:ABS_BUILDDIR/virstoragedata/wrap
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qcow2-auto_raw-raw-relative b/tests/virstoragetestdata/out/qcow2-auto_raw-raw-relative
index 9f8246900d..e145cca417 100644
--- a/tests/virstoragetestdata/out/qcow2-auto_raw-raw-relative
+++ b/tests/virstoragetestdata/out/qcow2-auto_raw-raw-relative
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_raw-raw-relative.qcow2
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_nbd-raw b/tests/virstoragetestdata/out/qcow2-qcow2_nbd-raw
index 761e65b234..0c2bb0ddc4 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_nbd-raw
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_nbd-raw
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_nbd-raw.qcow2
 backingStoreRaw: nbd+tcp://example.org:6000/blah
+backingStoreRawFormat: raw(1)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:blah
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-auto b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-auto
index 57f2f51108..58f1dd6d9e 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-auto
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-auto
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_qcow2-auto.qcow2
 backingStoreRaw: qcow2
+backingStoreRawFormat: <null>(-1)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 1024
 encryption: 0
 relPath:qcow2
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_qcow2-auto b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_qcow2-auto
index 99d3c4c273..81263c4bc0 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_qcow2-auto
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_qcow2-auto
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_qcow2-qcow2_qcow2-auto.qcow2
 backingStoreRaw: qcow2_qcow2-auto.qcow2
+backingStoreRawFormat: qcow2(14)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_qcow2-auto.qcow2
 backingStoreRaw: qcow2
+backingStoreRawFormat: <null>(-1)
 capacity: 1024
 encryption: 0
 relPath:qcow2_qcow2-auto.qcow2
@@ -20,6 +22,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 1024
 encryption: 0
 relPath:qcow2
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-auto b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-auto
index 9734cf22b9..cbb8d6a33f 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-auto
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-auto
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_qcow2-qcow2_raw-auto.qcow2
 backingStoreRaw: qcow2_raw-auto.qcow2
+backingStoreRawFormat: qcow2(14)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_raw-auto.qcow2
 backingStoreRaw: raw
+backingStoreRawFormat: <null>(-1)
 capacity: 1024
 encryption: 0
 relPath:qcow2_raw-auto.qcow2
@@ -20,6 +22,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:raw
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-raw b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-raw
index 0c90e9858d..de11029922 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-raw
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_qcow2-qcow2_raw-raw
@@ -1,5 +1,6 @@
 path:ABS_BUILDDIR/virstoragedata/wrap
 backingStoreRaw: ABS_BUILDDIR/virstoragedata/qcow2
+backingStoreRawFormat: qcow2(14)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_BUILDDIR/virstoragedata/qcow2
 backingStoreRaw: ABS_BUILDDIR/virstoragedata/raw
+backingStoreRawFormat: raw(1)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -20,6 +22,7 @@ hostname:<null>
 
 path:ABS_BUILDDIR/virstoragedata/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qcow2-qcow2_raw-raw-relative b/tests/virstoragetestdata/out/qcow2-qcow2_raw-raw-relative
index 552353e980..b4bfd432ad 100644
--- a/tests/virstoragetestdata/out/qcow2-qcow2_raw-raw-relative
+++ b/tests/virstoragetestdata/out/qcow2-qcow2_raw-raw-relative
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qcow2_raw-raw-relative.qcow2
 backingStoreRaw: raw
+backingStoreRawFormat: raw(1)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:raw
diff --git a/tests/virstoragetestdata/out/qcow2-symlinks b/tests/virstoragetestdata/out/qcow2-symlinks
index 8e531e4cf8..f053f95fd7 100644
--- a/tests/virstoragetestdata/out/qcow2-symlinks
+++ b/tests/virstoragetestdata/out/qcow2-symlinks
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/sub/link2
 backingStoreRaw: ../sub/link1
+backingStoreRawFormat: qcow2(14)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/sub/../sub/link1
 backingStoreRaw: ../raw
+backingStoreRawFormat: raw(1)
 capacity: 1024
 encryption: 0
 relPath:../sub/link1
@@ -20,6 +22,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/sub/../sub/../raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:../raw
diff --git a/tests/virstoragetestdata/out/qed-auto_raw b/tests/virstoragetestdata/out/qed-auto_raw
index a75ef8189b..260c3fbc79 100644
--- a/tests/virstoragetestdata/out/qed-auto_raw
+++ b/tests/virstoragetestdata/out/qed-auto_raw
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qed_raw-raw-relative
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/qed-qed_raw b/tests/virstoragetestdata/out/qed-qed_raw
index 18a5091e6f..a13d407a5f 100644
--- a/tests/virstoragetestdata/out/qed-qed_raw
+++ b/tests/virstoragetestdata/out/qed-qed_raw
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/qed_raw-raw-relative
 backingStoreRaw: raw
+backingStoreRawFormat: raw(1)
 capacity: 1024
 encryption: 0
 relPath:<null>
@@ -10,6 +11,7 @@ hostname:<null>
 
 path:ABS_SRCDIR/virstoragetestdata/images/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:raw
diff --git a/tests/virstoragetestdata/out/raw-auto b/tests/virstoragetestdata/out/raw-auto
index 90a9dfceda..70ec22f309 100644
--- a/tests/virstoragetestdata/out/raw-auto
+++ b/tests/virstoragetestdata/out/raw-auto
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>
diff --git a/tests/virstoragetestdata/out/raw-raw b/tests/virstoragetestdata/out/raw-raw
index 90a9dfceda..70ec22f309 100644
--- a/tests/virstoragetestdata/out/raw-raw
+++ b/tests/virstoragetestdata/out/raw-raw
@@ -1,5 +1,6 @@
 path:ABS_SRCDIR/virstoragetestdata/images/raw
 backingStoreRaw: <null>
+backingStoreRawFormat: none(0)
 capacity: 0
 encryption: 0
 relPath:<null>