diff --git a/tarsum/tarsum_test.go b/tarsum/tarsum_test.go
index 968d7c7..a99585e 100644
--- a/tarsum/tarsum_test.go
+++ b/tarsum/tarsum_test.go
@@ -32,33 +32,33 @@ var testLayers = []testLayer{
 		filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
 		jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
 		version:  Version0,
-		tarsum:   "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"},
+		tarsum:   "tarsum+sha256:4095cc12fa5fdb1ab2760377e1cd0c4ecdd3e61b4f9b82319d96fcea6c9a41c6"},
 	{
 		filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
 		jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
 		version:  VersionDev,
-		tarsum:   "tarsum.dev+sha256:486b86e25c4db4551228154848bc4663b15dd95784b1588980f4ba1cb42e83e9"},
+		tarsum:   "tarsum.dev+sha256:db56e35eec6ce65ba1588c20ba6b1ea23743b59e81fb6b7f358ccbde5580345c"},
 	{
 		filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
 		jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
 		gzip:     true,
-		tarsum:   "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"},
+		tarsum:   "tarsum+sha256:4095cc12fa5fdb1ab2760377e1cd0c4ecdd3e61b4f9b82319d96fcea6c9a41c6"},
 	{
 		// Tests existing version of TarSum when xattrs are present
 		filename: "testdata/xattr/layer.tar",
 		jsonfile: "testdata/xattr/json",
 		version:  Version0,
-		tarsum:   "tarsum+sha256:e86f81a4d552f13039b1396ed03ca968ea9717581f9577ef1876ea6ff9b38c98"},
+		tarsum:   "tarsum+sha256:07e304a8dbcb215b37649fde1a699f8aeea47e60815707f1cdf4d55d25ff6ab4"},
 	{
 		// Tests next version of TarSum when xattrs are present
 		filename: "testdata/xattr/layer.tar",
 		jsonfile: "testdata/xattr/json",
 		version:  VersionDev,
-		tarsum:   "tarsum.dev+sha256:6235cd3a2afb7501bac541772a3d61a3634e95bc90bb39a4676e2cb98d08390d"},
+		tarsum:   "tarsum.dev+sha256:6c58917892d77b3b357b0f9ad1e28e1f4ae4de3a8006bd3beb8beda214d8fd16"},
 	{
 		filename: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar",
 		jsonfile: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json",
-		tarsum:   "tarsum+sha256:ac672ee85da9ab7f9667ae3c32841d3e42f33cc52c273c23341dabba1c8b0c8b"},
+		tarsum:   "tarsum+sha256:c66bd5ec9f87b8f4c6135ca37684618f486a3dd1d113b138d0a177bfa39c2571"},
 	{
 		options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
 		tarsum:  "tarsum+sha256:8bf12d7e67c51ee2e8306cba569398b1b9f419969521a12ffb9d8875e8836738"},
diff --git a/tarsum/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json b/tarsum/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json
index 0f0ba49..48e2af3 100644
--- a/tarsum/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json
+++ b/tarsum/testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json
@@ -1 +1 @@
-{"id":"46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457","parent":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","created":"2014-04-07T02:45:52.610504484Z","container":"e0f07f8d72cae171a3dcc35859960e7e956e0628bce6fedc4122bf55b2c287c7","container_config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","sed -ri 's/^(%wheel.*)(ALL)$/\\1NOPASSWD: \\2/' /etc/sudoers"],"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"docker_version":"0.9.1-dev","config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":null,"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"architecture":"amd64","os":"linux","Size":3425}
\ No newline at end of file
+{"id":"46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457","parent":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","created":"2014-04-07T02:45:52.610504484Z","container":"e0f07f8d72cae171a3dcc35859960e7e956e0628bce6fedc4122bf55b2c287c7","container_config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","sed -ri 's/^(%wheel.*)(ALL)$/\\1NOPASSWD: \\2/' /etc/sudoers"],"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"docker_version":"0.9.1-dev","config":{"Hostname":"88807319f25e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":null,"Image":"def3f9165934325dfd027c86530b2ea49bb57a0963eb1336b3a0415ff6fd56de","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"architecture":"amd64","os":"linux","Size":3425}
\ No newline at end of file
diff --git a/tarsum/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json b/tarsum/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json
index 12c18a0..af57be0 100644
--- a/tarsum/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json
+++ b/tarsum/testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json
@@ -1 +1 @@
-{"id":"511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158","comment":"Imported from -","created":"2013-06-13T14:03:50.821769-07:00","container_config":{"Hostname":"","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":null,"Image":"","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":null},"docker_version":"0.4.0","architecture":"x86_64","Size":0}
\ No newline at end of file
+{"id":"511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158","comment":"Imported from -","created":"2013-06-13T14:03:50.821769-07:00","container_config":{"Hostname":"","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":null,"Image":"","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":null},"docker_version":"0.4.0","architecture":"x86_64","Size":0}
\ No newline at end of file
diff --git a/tarsum/testdata/xattr/json b/tarsum/testdata/xattr/json
index 328ea31..288441a 100644
--- a/tarsum/testdata/xattr/json
+++ b/tarsum/testdata/xattr/json
@@ -1 +1 @@
-{"id":"4439c3c7f847954100b42b267e7e5529cac1d6934db082f65795c5ca2e594d93","parent":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","created":"2014-05-16T17:19:44.091534414Z","container":"5f92fb06cc58f357f0cde41394e2bbbb664e663974b2ac1693ab07b7a306749b","container_config":{"Hostname":"9565c6517a0e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"Cpuset":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","setcap 'cap_setgid,cap_setuid+ep' ./file \u0026\u0026 getcap ./file"],"Image":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"docker_version":"0.11.1-dev","config":{"Hostname":"9565c6517a0e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"Cpuset":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"PortSpecs":null,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":null,"Image":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"architecture":"amd64","os":"linux","Size":0}
\ No newline at end of file
+{"id":"4439c3c7f847954100b42b267e7e5529cac1d6934db082f65795c5ca2e594d93","parent":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","created":"2014-05-16T17:19:44.091534414Z","container":"5f92fb06cc58f357f0cde41394e2bbbb664e663974b2ac1693ab07b7a306749b","container_config":{"Hostname":"9565c6517a0e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"Cpuset":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":["/bin/sh","-c","setcap 'cap_setgid,cap_setuid+ep' ./file \u0026\u0026 getcap ./file"],"Image":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"docker_version":"0.11.1-dev","config":{"Hostname":"9565c6517a0e","Domainname":"","User":"","Memory":0,"MemorySwap":0,"CpuShares":0,"Cpuset":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["HOME=/","PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],"Cmd":null,"Image":"73b164f4437db87e96e90083c73a6592f549646ae2ec00ed33c6b9b49a5c4470","Volumes":null,"WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"OnBuild":[]},"architecture":"amd64","os":"linux","Size":0}
\ No newline at end of file