diff --git a/tests/domaincapsschemadata/bhyve_basic.x86_64.xml b/tests/domaincapsschemadata/bhyve_basic.x86_64.xml
index 70e36e97e9..055d05b568 100644
--- a/tests/domaincapsschemadata/bhyve_basic.x86_64.xml
+++ b/tests/domaincapsschemadata/bhyve_basic.x86_64.xml
@@ -2,6 +2,7 @@
   <path>/usr/sbin/bhyve</path>
   <domain>bhyve</domain>
   <arch>x86_64</arch>
+  <iothreads supported='no'/>
   <os supported='yes'>
     <loader supported='no'/>
   </os>
diff --git a/tests/domaincapsschemadata/bhyve_fbuf.x86_64.xml b/tests/domaincapsschemadata/bhyve_fbuf.x86_64.xml
index 19b76da456..b22ca43ba0 100644
--- a/tests/domaincapsschemadata/bhyve_fbuf.x86_64.xml
+++ b/tests/domaincapsschemadata/bhyve_fbuf.x86_64.xml
@@ -2,6 +2,7 @@
   <path>/usr/sbin/bhyve</path>
   <domain>bhyve</domain>
   <arch>x86_64</arch>
+  <iothreads supported='no'/>
   <os supported='yes'>
     <loader supported='yes'>
       <value>/foo/bar</value>
diff --git a/tests/domaincapsschemadata/bhyve_uefi.x86_64.xml b/tests/domaincapsschemadata/bhyve_uefi.x86_64.xml
index c278df038a..625a55e70c 100644
--- a/tests/domaincapsschemadata/bhyve_uefi.x86_64.xml
+++ b/tests/domaincapsschemadata/bhyve_uefi.x86_64.xml
@@ -2,6 +2,7 @@
   <path>/usr/sbin/bhyve</path>
   <domain>bhyve</domain>
   <arch>x86_64</arch>
+  <iothreads supported='no'/>
   <os supported='yes'>
     <loader supported='yes'>
       <value>/foo/bar</value>
diff --git a/tests/domaincapsschemadata/libxl-xenfv-usb.xml b/tests/domaincapsschemadata/libxl-xenfv-usb.xml
index dfa992cb71..3f245e8961 100644
--- a/tests/domaincapsschemadata/libxl-xenfv-usb.xml
+++ b/tests/domaincapsschemadata/libxl-xenfv-usb.xml
@@ -4,6 +4,7 @@
   <machine>xenfv</machine>
   <arch>x86_64</arch>
   <vcpu max='128'/>
+  <iothreads supported='no'/>
   <os supported='yes'>
     <loader supported='yes'>
       <value>/usr/lib/xen/boot/hvmloader</value>
diff --git a/tests/domaincapsschemadata/libxl-xenpv-usb.xml b/tests/domaincapsschemadata/libxl-xenpv-usb.xml
index 8277a9efdd..2bcd588c0f 100644
--- a/tests/domaincapsschemadata/libxl-xenpv-usb.xml
+++ b/tests/domaincapsschemadata/libxl-xenpv-usb.xml
@@ -4,6 +4,7 @@
   <machine>xenpv</machine>
   <arch>x86_64</arch>
   <vcpu max='512'/>
+  <iothreads supported='no'/>
   <os supported='yes'>
     <loader supported='no'/>
   </os>