diff --git a/internal/rosa/package/qemu/copy-before-write-spurious.patch b/internal/rosa/package/qemu/copy-before-write-spurious.patch
new file mode 100644
index 00000000..a47d93f1
--- /dev/null
+++ b/internal/rosa/package/qemu/copy-before-write-spurious.patch
@@ -0,0 +1,12 @@
+diff --git a/tests/qemu-iotests/tests/copy-before-write b/tests/qemu-iotests/tests/copy-before-write
+index 236cb8ac37..0eac14005e 100755
+--- a/tests/qemu-iotests/tests/copy-before-write
++++ b/tests/qemu-iotests/tests/copy-before-write
+@@ -279,6 +279,7 @@ read 1048576/1048576 bytes at offset 0
+         return log
+ 
+     def test_timeout_break_guest(self):
++        return
+         log = self.do_cbw_timeout('break-guest-write')
+         # macOS and FreeBSD tend to represent ETIMEDOUT as
+         # "Operation timed out", when Linux prefer
diff --git a/internal/rosa/package/qemu/iotests-zfs.patch b/internal/rosa/package/qemu/iotests-zfs.patch
new file mode 100644
index 00000000..336257fc
--- /dev/null
+++ b/internal/rosa/package/qemu/iotests-zfs.patch
@@ -0,0 +1,16 @@
+diff --git a/tests/qemu-iotests/150 b/tests/qemu-iotests/150
+index fab0faa389..d71fb5978d 100755
+--- a/tests/qemu-iotests/150
++++ b/tests/qemu-iotests/150
+@@ -41,6 +41,11 @@ _supported_fmt raw qcow2
+ _supported_proto file
+ _supported_os Linux
+ 
++# work directory is never an overlay
++if [ "$(stat -fc '%T' /work/)" = "zfs" ]; then
++    _notrun 'fails on zfs'
++fi
++
+ 
+ img_size=1048576
+ 
diff --git a/internal/rosa/package/qemu/package.az b/internal/rosa/package/qemu/package.az
index 4690fa89..ea24bad2 100644
--- a/internal/rosa/package/qemu/package.az
+++ b/internal/rosa/package/qemu/package.az
@@ -11,10 +11,14 @@ package qemu {
 	};
 	patches = [
 		"meson-colour.patch",
+		"iotests-zfs.patch",
 
 		"disable-mcast-test.patch",
 		// fails with ipv6 disabled
 		"disable-netdev-socket.patch",
+
+		// fails on a slower machine
+		"copy-before-write-spurious.patch",
 	];
 
 	// configure script uses source as scratch space
@@ -31,10 +35,6 @@ sed -i \
 	tests/qemu-iotests/[0-9][0-9][0-9]* \
 	tests/qemu-iotests/tests/copy-before-write \
 	tests/qemu-iotests/tests/file-io-error.out
-cat << EOF > tests/qemu-iotests/150
-#!/bin/sh
-_notrun 'appears to spuriously fail on zfs'
-EOF
 `;
 
 	exec = make {