diff --git a/0001-tests-Accommodate-qemu-img-4.1-output-change.patch b/0001-tests-Accommodate-qemu-img-4.1-output-change.patch
deleted file mode 100644
index 7b02f79..0000000
--- a/0001-tests-Accommodate-qemu-img-4.1-output-change.patch
+++ /dev/null
@@ -1,146 +0,0 @@
-From 902f2203f0bc38de25dffd885ca837fe59e4a3fb Mon Sep 17 00:00:00 2001
-From: Eric Blake <eblake@redhat.com>
-Date: Tue, 30 Jul 2019 15:58:06 -0500
-Subject: [PATCH] tests: Accommodate qemu-img 4.1 output change
-
-Where qemu-img 4.0 used to say 'virtual size: 100M', the 4.1 release
-now says 'virtual size: 100 MiB'.  Similarly, '5.0G' turned into '5
-GiB'. But rather than worry about potential future changes to the
-human-readable output, we can just use --output=json (at which point
-we no longer even have to force qemu-img to the C locale, which we
-were not even doing consistently).  It might be slightly more robust
-to find our specific information using jq, but for now a grep of the
-output json is still reliable enough for our needs.
-
-If the '\b' is a problem on BSD, we could use '([, ]|$)' instead.  Or
-that's where jq would make it easier to parse off a given number
-without worrying about what comes after the number.
-
-Signed-off-by: Eric Blake <eblake@redhat.com>
----
- tests/test-ip.sh          | 10 ++++++----
- tests/test-nbd-tls-psk.sh |  6 +++---
- tests/test-nbd-tls.sh     |  6 +++---
- tests/test-tls-psk.sh     |  7 +++----
- tests/test-tls.sh         |  7 +++----
- tests/test-truncate3.sh   |  4 ++--
- 6 files changed, 20 insertions(+), 20 deletions(-)
-
-diff --git a/tests/test-ip.sh b/tests/test-ip.sh
-index 636d3d3..a0f1862 100755
---- a/tests/test-ip.sh
-+++ b/tests/test-ip.sh
-@@ -57,15 +57,17 @@ kill -s 0 $pid
- # Check we can connect over the IPv4 loopback interface.
- ipv4_lo="$(ip -o -4 addr show scope host)"
- if test -n "$ipv4_lo"; then
--    qemu-img info --image-opts "file.driver=nbd,file.host=127.0.0.1,file.port=$port" > ipv4.out
-+    qemu-img info --output=json \
-+        --image-opts "file.driver=nbd,file.host=127.0.0.1,file.port=$port" > ipv4.out
-     cat ipv4.out
--    grep -sq "^virtual size: 100M" ipv4.out
-+    grep -sq '"virtual-size": *104857600\b' ipv4.out
- fi
- 
- # Check we can connect over the IPv6 loopback interface.
- ipv6_lo="$(ip -o -6 addr show scope host)"
- if test -n "$ipv6_lo"; then
--    qemu-img info --image-opts "file.driver=nbd,file.host=::1,file.port=$port" > ipv6.out
-+    qemu-img info --output=json \
-+        --image-opts "file.driver=nbd,file.host=::1,file.port=$port" > ipv6.out
-     cat ipv6.out
--    grep -sq "^virtual size: 100M" ipv6.out
-+    grep -sq '"virtual-size": *104857600\b' ipv6.out
- fi
-diff --git a/tests/test-nbd-tls-psk.sh b/tests/test-nbd-tls-psk.sh
-index d0bbc46..82822d1 100755
---- a/tests/test-nbd-tls-psk.sh
-+++ b/tests/test-nbd-tls-psk.sh
-@@ -73,9 +73,9 @@ LIBNBD_DEBUG=1 start_nbdkit -P "$pid2" -U "$sock2" --tls=off \
-     nbd tls=require tls-psk=keys.psk tls-username=qemu socket="$sock1"
- 
- # Run unencrypted client
--LANG=C qemu-img info -f raw "nbd+unix:///?socket=$sock2" > nbd-tls-psk.out
-+qemu-img info --output=json -f raw "nbd+unix:///?socket=$sock2" > nbd-tls-psk.out
- 
- cat nbd-tls-psk.out
- 
--grep -sq "^file format: raw" nbd-tls-psk.out
--grep -sq "^virtual size: 100M" nbd-tls-psk.out
-+grep -sq '"format": *"raw"' nbd-tls-psk.out
-+grep -sq '"virtual-size": *104857600\b' nbd-tls-psk.out
-diff --git a/tests/test-nbd-tls.sh b/tests/test-nbd-tls.sh
-index af824d2..c4f4fac 100755
---- a/tests/test-nbd-tls.sh
-+++ b/tests/test-nbd-tls.sh
-@@ -74,9 +74,9 @@ LIBNBD_DEBUG=1 start_nbdkit -P "$pid2" -U "$sock2" --tls=off \
-     nbd tls=require tls-certificates="$pkidir" socket="$sock1"
- 
- # Run unencrypted client
--LANG=C qemu-img info -f raw "nbd+unix:///?socket=$sock2" > nbd-tls.out
-+qemu-img info --output=json -f raw "nbd+unix:///?socket=$sock2" > nbd-tls.out
- 
- cat nbd-tls.out
- 
--grep -sq "^file format: raw" nbd-tls.out
--grep -sq "^virtual size: 100M" nbd-tls.out
-+grep -sq '"format": *"raw"' nbd-tls.out
-+grep -sq '"virtual-size": *104857600\b' nbd-tls.out
-diff --git a/tests/test-tls-psk.sh b/tests/test-tls-psk.sh
-index 393f589..a4ecb60 100755
---- a/tests/test-tls-psk.sh
-+++ b/tests/test-tls-psk.sh
-@@ -72,12 +72,11 @@ start_nbdkit -P tls-psk.pid -p $port -n \
-              --tls=require --tls-psk=keys.psk example1
- 
- # Run qemu-img against the server.
--LANG=C \
--qemu-img info \
-+qemu-img info --output=json \
-          --object "tls-creds-psk,id=tls0,endpoint=client,dir=$PWD" \
-          --image-opts "file.driver=nbd,file.host=localhost,file.port=$port,file.tls-creds=tls0" > tls-psk.out
- 
- cat tls-psk.out
- 
--grep -sq "^file format: raw" tls-psk.out
--grep -sq "^virtual size: 100M" tls-psk.out
-+grep -sq '"format": *"raw"' tls-psk.out
-+grep -sq '"virtual-size": *104857600\b' tls-psk.out
-diff --git a/tests/test-tls.sh b/tests/test-tls.sh
-index 70d40ae..2718e55 100755
---- a/tests/test-tls.sh
-+++ b/tests/test-tls.sh
-@@ -65,12 +65,11 @@ start_nbdkit -P tls.pid -p $port -n --tls=require \
-        --tls-certificates="$pkidir" example1
- 
- # Run qemu-img against the server.
--LANG=C \
--qemu-img info \
-+qemu-img info --output=json \
-          --object "tls-creds-x509,id=tls0,endpoint=client,dir=$pkidir" \
-          --image-opts "file.driver=nbd,file.host=localhost,file.port=$port,file.tls-creds=tls0" > tls.out
- 
- cat tls.out
- 
--grep -sq "^file format: raw" tls.out
--grep -sq "^virtual size: 100M" tls.out
-+grep -sq '"format": *"raw"' tls.out
-+grep -sq '"virtual-size": *104857600\b' tls.out
-diff --git a/tests/test-truncate3.sh b/tests/test-truncate3.sh
-index 0a7fba8..885d58f 100755
---- a/tests/test-truncate3.sh
-+++ b/tests/test-truncate3.sh
-@@ -50,8 +50,8 @@ start_nbdkit -P truncate3.pid -U $sock \
-        pattern 5G \
-        round-up=512
- 
--LANG=C qemu-img info nbd:unix:$sock > truncate3.out
--if ! grep "virtual size: 5.0G" truncate3.out; then
-+qemu-img info --output=json nbd:unix:$sock > truncate3.out
-+if ! grep '"virtual-size": *5368709120' truncate3.out; then
-     echo "$0: unexpected output from truncate3 regression test:"
-     cat truncate3.out
-     exit 1
--- 
-2.22.0
-
diff --git a/nbdkit.spec b/nbdkit.spec
index 407f46a..2ea0fcf 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -27,8 +27,8 @@
 %global source_directory 1.13-development
 
 Name:           nbdkit
-Version:        1.13.7
-Release:        2%{?dist}
+Version:        1.13.8
+Release:        1%{?dist}
 Summary:        NBD server
 
 License:        BSD
@@ -41,9 +41,6 @@ Source1:        http://libguestfs.org/download/nbdkit/%{source_directory}/%{name
 Source2:       libguestfs.keyring
 %endif
 
-# Upstream patch to deal with qemu-img 4.1 output change.
-Patch1:        0001-tests-Accommodate-qemu-img-4.1-output-change.patch
-
 %if 0%{patches_touch_autotools}
 BuildRequires: autoconf, automake, libtool
 %endif
@@ -842,6 +839,9 @@ make %{?_smp_mflags} check || {
 
 
 %changelog
+* Fri Aug  2 2019 Richard W.M. Jones <rjones@redhat.com> - 1.13.8-1
+- New upstream version 1.13.8.
+
 * Wed Jul 31 2019 Richard W.M. Jones <rjones@redhat.com> - 1.13.7-2
 - Add upstream patch to deal with qemu-img 4.1 output change.
 
diff --git a/sources b/sources
index ab42c4d..8eb9ba9 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (nbdkit-1.13.7.tar.gz) = f750617cbc016d6cc4adc52e6f2fbf1ce48fa669cf08fe9cc96bf171111907ba2af57deaf9d1edf6e62882e7d8812a1d1595290fda07401221978b445e72966d
-SHA512 (nbdkit-1.13.7.tar.gz.sig) = f199cc75d67f850222205a3aa57e601d68c58065e7445ff7427e594a8c7bf2f5544827f0627a4c7b39ac9c1952863af6f2dcec7d97563586d856920652cf8d2d
+SHA512 (nbdkit-1.13.8.tar.gz) = 51dbe6852f7539a2e07a1435499272a4a3e68163e3e9c90cc460e3d18b9aab26bbd37c6f15c780908d3335b414386aff69943d759a4a2ce3fc09024b7aa8438e
+SHA512 (nbdkit-1.13.8.tar.gz.sig) = 34ff83f6bf345fa03081b985abbbf2a93bef6583cd7a67126d9b11c03bab226573a414e69624fb2bde1ca0654a5614d3915a81898d66ebbc05480116f12a3e8c