diff --git a/tests/qemublocktest.c b/tests/qemublocktest.c
index 0bc4b65449b1c24d6428e3a459c175f6c325bfbd..1bf72a4615a43b9cfbba8aa6e865dfe97ea3e8e8 100644
--- a/tests/qemublocktest.c
+++ b/tests/qemublocktest.c
@@ -420,8 +420,8 @@ testQemuImageCreate(const void *opaque)
         return -1;
 
     /* fake some sizes */
-    src->capacity = 1337;
-    src->physical = 42;
+    src->capacity = UINT_MAX * 2ULL;
+    src->physical = UINT_MAX + 1ULL;
 
     if (qemuDomainValidateStorageSource(src, data->qemuCaps) < 0)
         return -1;
diff --git a/tests/qemublocktestdata/imagecreate/luks-encopts.json b/tests/qemublocktestdata/imagecreate/luks-encopts.json
index f065ad89a79ddadabeb78838cbbfbd792b8390a8..c5ca863f5bdd2c9979a37c97c5163e9cc540f6bb 100644
--- a/tests/qemublocktestdata/imagecreate/luks-encopts.json
+++ b/tests/qemublocktestdata/imagecreate/luks-encopts.json
@@ -2,7 +2,7 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.img",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
@@ -15,5 +15,5 @@ format:
   "ivgen-hash-alg": "sha256",
   "driver": "luks",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/luks-noopts.json b/tests/qemublocktestdata/imagecreate/luks-noopts.json
index 1ea1948119f8e004ccd1e57b135a2f4932bc79b1..8a0944151d9a7b280f6f063c89a36477172d1de4 100644
--- a/tests/qemublocktestdata/imagecreate/luks-noopts.json
+++ b/tests/qemublocktestdata/imagecreate/luks-noopts.json
@@ -2,7 +2,7 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.img",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
@@ -10,5 +10,5 @@ format:
   "key-secret": "0123456789ABCDEF0123456789ABCDE-encalias",
   "driver": "luks",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/network-gluster-qcow2.json b/tests/qemublocktestdata/imagecreate/network-gluster-qcow2.json
index aee7bfd4016f8be838ad5041bc4610f8a2c1ad02..3e35beb08870e15f7672572dc62be31620a7a3b7 100644
--- a/tests/qemublocktestdata/imagecreate/network-gluster-qcow2.json
+++ b/tests/qemublocktestdata/imagecreate/network-gluster-qcow2.json
@@ -17,12 +17,12 @@ protocol:
       }
     ]
   },
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/network-rbd-qcow2.json b/tests/qemublocktestdata/imagecreate/network-rbd-qcow2.json
index 56d9c0f1ed80a02d5a3a12650b83788566f7b250..67e2679dae72dba51dded09f0d709bc69aaa74cd 100644
--- a/tests/qemublocktestdata/imagecreate/network-rbd-qcow2.json
+++ b/tests/qemublocktestdata/imagecreate/network-rbd-qcow2.json
@@ -15,12 +15,12 @@ protocol:
       }
     ]
   },
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/network-sheepdog-qcow2.json b/tests/qemublocktestdata/imagecreate/network-sheepdog-qcow2.json
index b7272625a29cb726cafb3689fe65833fc834371a..d86bef6bc80cdde9eb198626795dacbb5c9fdf83 100644
--- a/tests/qemublocktestdata/imagecreate/network-sheepdog-qcow2.json
+++ b/tests/qemublocktestdata/imagecreate/network-sheepdog-qcow2.json
@@ -9,12 +9,12 @@ protocol:
     },
     "vdi": "asdf/i.qcow2"
   },
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/network-ssh-qcow2.json b/tests/qemublocktestdata/imagecreate/network-ssh-qcow2.json
index 31416ed4fccf3e8d739a172096328293eb8e467f..d58054c081d9027fe1b13b5921a152906d6f1b7d 100644
--- a/tests/qemublocktestdata/imagecreate/network-ssh-qcow2.json
+++ b/tests/qemublocktestdata/imagecreate/network-ssh-qcow2.json
@@ -8,12 +8,12 @@ protocol:
       "port": "1234"
     }
   },
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-backing-luks.json b/tests/qemublocktestdata/imagecreate/qcow2-backing-luks.json
index 63ba35dc79dba7bbbfcd8e7956bf00078650698b..5f9a800c6cf51318bb635e2b0203646f19f8534b 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-backing-luks.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-backing-luks.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "backing-file": "/var/lib/libvirt/images/i.img",
   "backing-fmt": "luks"
 }
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-backing-raw-nbd.json b/tests/qemublocktestdata/imagecreate/qcow2-backing-raw-nbd.json
index b9d1d97302f4eec35d502dfb2c065f2015d35d16..c10ab98c8a5a41c6beaad34c2a7e858b8774e66b 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-backing-raw-nbd.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-backing-raw-nbd.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "backing-file": "nbd://example.com:1234",
   "backing-fmt": "raw"
 }
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-backing-raw.json b/tests/qemublocktestdata/imagecreate/qcow2-backing-raw.json
index 8176c8daddb7a74b666f44adcfb663f8145a1712..eb9fb413f65d573051b76a12a99a936411e33037 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-backing-raw.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-backing-raw.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "backing-file": "/var/lib/libvirt/images/i.img",
   "backing-fmt": "raw"
 }
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts-backing.json b/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts-backing.json
index a57617dfac7900d31d429f9b7ef15bce34e31a97..641b5e04c9a2cf0ccee932e2c8e2d6b6e815d9ac 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts-backing.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts-backing.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "backing-file": "/var/lib/libvirt/images/i.qcow2",
   "backing-fmt": "qcow2",
   "encrypt": {
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts.json b/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts.json
index 8796726fcb60474aa842dc81444ad3078df5daef..28c85ec90b530eb604dfbf328eefc0f3d4b327ea 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-luks-encopts.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "encrypt": {
     "key-secret": "0123456789ABCDEF0123456789ABCDE-encalias",
     "cipher-alg": "serpent-256",
diff --git a/tests/qemublocktestdata/imagecreate/qcow2-luks-noopts.json b/tests/qemublocktestdata/imagecreate/qcow2-luks-noopts.json
index f9caaee6bbbc6ec6e21f7785950ce25cb6f14a06..b5063a846d05579a8eac6d74778541888a8d316c 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2-luks-noopts.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2-luks-noopts.json
@@ -2,14 +2,14 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337,
+  "size": 8589934590,
   "encrypt": {
     "key-secret": "0123456789ABCDEF0123456789ABCDE-encalias",
     "format": "luks"
diff --git a/tests/qemublocktestdata/imagecreate/qcow2.json b/tests/qemublocktestdata/imagecreate/qcow2.json
index 7142cf67b655545eb29682403565181fcbc794c0..732763b763897b2437a2ab39b2fd5ed072b21f84 100644
--- a/tests/qemublocktestdata/imagecreate/qcow2.json
+++ b/tests/qemublocktestdata/imagecreate/qcow2.json
@@ -2,12 +2,12 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.qcow2",
-  "size": 42
+  "size": 4294967296
 }
 
 format:
 {
   "driver": "qcow2",
   "file": "0123456789ABCDEF0123456789ABCDE",
-  "size": 1337
+  "size": 8589934590
 }
diff --git a/tests/qemublocktestdata/imagecreate/raw.json b/tests/qemublocktestdata/imagecreate/raw.json
index 06abb25ab9b3bbc4874671069eedeb92ed46cbe3..89a6c2d237bfd9c060f2985be18cc6aabfe1f45c 100644
--- a/tests/qemublocktestdata/imagecreate/raw.json
+++ b/tests/qemublocktestdata/imagecreate/raw.json
@@ -2,7 +2,7 @@ protocol:
 {
   "driver": "file",
   "filename": "/var/lib/libvirt/images/i.img",
-  "size": 42
+  "size": 4294967296
 }
 
 format: