diff --git a/tests/qemu-iotests/031.out b/tests/qemu-iotests/031.out
index 5a4beda..966c8d9 100644
--- a/tests/qemu-iotests/031.out
+++ b/tests/qemu-iotests/031.out
@@ -24,7 +24,7 @@ autoclear_features        []
 refcount_order            4
 header_length             72
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
@@ -52,7 +52,7 @@ autoclear_features        []
 refcount_order            4
 header_length             72
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
@@ -80,12 +80,12 @@ autoclear_features        []
 refcount_order            4
 header_length             72
 
-Header extension:
+Header extension:         Backing format
 magic                     0xe2792aca
 length                    11
 data                      'host_device'
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
@@ -115,12 +115,12 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
@@ -148,12 +148,12 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
@@ -181,17 +181,17 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Backing format
 magic                     0xe2792aca
 length                    11
 data                      'host_device'
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
 
-Header extension:
+Header extension:         Unknown
 magic                     0x12345678
 length                    31
 data                      'This is a test header extension'
diff --git a/tests/qemu-iotests/036.out b/tests/qemu-iotests/036.out
index e409acf..81a7366 100644
--- a/tests/qemu-iotests/036.out
+++ b/tests/qemu-iotests/036.out
@@ -24,7 +24,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 incompatible_features     []
 compatible_features       []
 autoclear_features        [63]
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -36,7 +36,7 @@ No errors were found on the image.
 incompatible_features     []
 compatible_features       []
 autoclear_features        []
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index a51ad1b..7821b7f 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -24,7 +24,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -82,7 +82,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -138,7 +138,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -193,7 +193,7 @@ autoclear_features        [42]
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -262,7 +262,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -324,7 +324,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -353,7 +353,7 @@ autoclear_features        []
 refcount_order            4
 header_length             112
 
-Header extension:
+Header extension:         Feature table
 magic                     0x6803f857
 length                    336
 data                      <binary>
@@ -491,7 +491,7 @@ wrote 65536/65536 bytes at offset 2147483648
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 65536/65536 bytes at offset 3221225472
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-    (0.00/100%)
    (12.50/100%)
    (25.00/100%)
    (37.50/100%)
    (50.00/100%)
    (62.50/100%)
    (75.00/100%)
    (87.50/100%)
    (100.00/100%)
    (100.00/100%)
+    (0.00/100%)    (12.50/100%)    (25.00/100%)    (37.50/100%)    (50.00/100%)    (62.50/100%)    (75.00/100%)    (87.50/100%)    (100.00/100%)    (100.00/100%)
 No errors were found on the image.
 
 === Testing progress report with snapshot ===
@@ -506,7 +506,7 @@ wrote 65536/65536 bytes at offset 2147483648
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 65536/65536 bytes at offset 3221225472
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-    (0.00/100%)
    (6.25/100%)
    (12.50/100%)
    (18.75/100%)
    (25.00/100%)
    (31.25/100%)
    (37.50/100%)
    (43.75/100%)
    (50.00/100%)
    (56.25/100%)
    (62.50/100%)
    (68.75/100%)
    (75.00/100%)
    (81.25/100%)
    (87.50/100%)
    (93.75/100%)
    (100.00/100%)
    (100.00/100%)
+    (0.00/100%)    (6.25/100%)    (12.50/100%)    (18.75/100%)    (25.00/100%)    (31.25/100%)    (37.50/100%)    (43.75/100%)    (50.00/100%)    (56.25/100%)    (62.50/100%)    (68.75/100%)    (75.00/100%)    (81.25/100%)    (87.50/100%)    (93.75/100%)    (100.00/100%)    (100.00/100%)
 No errors were found on the image.
 
 === Testing version downgrade with external data file ===
diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py
index 94a07b2..e824b09 100755
--- a/tests/qemu-iotests/qcow2.py
+++ b/tests/qemu-iotests/qcow2.py
@@ -6,19 +6,36 @@ import string
 
 class QcowHeaderExtension:
 
+    QCOW2_EXT_MAGIC_BACKING_FORMAT = 0xE2792ACA
+    QCOW2_EXT_MAGIC_FEATURE_TABLE = 0x6803f857
+    QCOW2_EXT_MAGIC_CRYPTO_HEADER = 0x0537be77
+    QCOW2_EXT_MAGIC_BITMAPS = 0x23852875
+    QCOW2_EXT_MAGIC_DATA_FILE = 0x44415441
+
     def __init__(self, magic, length, data):
         if length % 8 != 0:
             padding = 8 - (length % 8)
             data += b"\0" * padding
 
-        self.magic  = magic
+        self.magic = magic
         self.length = length
-        self.data   = data
+        self.data = data
+        self.name = self.extension_name(magic)
 
     @classmethod
     def create(cls, magic, data):
         return QcowHeaderExtension(magic, len(data), data)
 
+    def extension_name(self, magic):
+        return {
+            self.QCOW2_EXT_MAGIC_BACKING_FORMAT: 'Backing format',
+            self.QCOW2_EXT_MAGIC_FEATURE_TABLE: 'Feature table',
+            self.QCOW2_EXT_MAGIC_CRYPTO_HEADER: 'Crypto header',
+            self.QCOW2_EXT_MAGIC_BITMAPS: 'Bitmaps',
+            self.QCOW2_EXT_MAGIC_DATA_FILE: 'Data file',
+        }.get(magic, 'Unknown')
+
+
 class QcowHeader:
 
     uint32_t = 'I'
@@ -151,7 +168,7 @@ class QcowHeader:
             else:
                 data = "<binary>"
 
-            print("Header extension:")
+            print("%-25s %s" % ("Header extension:", ex.name))
             print("%-25s %#x" % ("magic", ex.magic))
             print("%-25s %d" % ("length", ex.length))
             print("%-25s %s" % ("data", data))
