diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 3c9b26a974..218dd7c715 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -987,7 +987,6 @@ struct virQEMUCapsStringFlags virQEMUCapsMigration[] = {
 };
 
 struct virQEMUCapsStringFlags virQEMUCapsEvents[] = {
-    { "SPICE_MIGRATE_COMPLETED", QEMU_CAPS_SEAMLESS_MIGRATION },
     { "DEVICE_DELETED", QEMU_CAPS_DEVICE_DEL_EVENT },
     { "MIGRATION", QEMU_CAPS_MIGRATION_EVENT },
     { "VSERPORT_CHANGE", QEMU_CAPS_VSERPORT_CHANGE },
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index d6aca729c0..9c1279bffb 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -202,7 +202,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     /* 110 */
     QEMU_CAPS_REBOOT_TIMEOUT, /* -boot reboot-timeout */
     X_QEMU_CAPS_DUMP_GUEST_CORE, /* dump-guest-core-parameter */
-    QEMU_CAPS_SEAMLESS_MIGRATION, /* seamless-migration for SPICE */
+    X_QEMU_CAPS_SEAMLESS_MIGRATION, /* seamless-migration for SPICE */
     QEMU_CAPS_BLOCK_COMMIT, /* block-commit */
     QEMU_CAPS_VNC, /* Is -vnc available? */
 
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index bef8f2c495..572d3bc20f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -8408,13 +8408,9 @@ qemuBuildGraphicsSPICECommandLine(virQEMUDriverConfigPtr cfg,
         }
     }
 
-    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SEAMLESS_MIGRATION)) {
-        /* If qemu supports seamless migration turn it
-         * unconditionally on. If migration destination
-         * doesn't support it, it fallbacks to previous
-         * migration algorithm silently. */
-        virBufferAddLit(&opt, "seamless-migration=on,");
-    }
+    /* Turn on seamless migration unconditionally. If migration destination
+     * doesn't support it, it fallbacks to previous migration algorithm silently. */
+    virBufferAddLit(&opt, "seamless-migration=on,");
 
     virBufferTrim(&opt, ",", -1);
 
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 1433b2c2f3..3107a279dd 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1339,8 +1339,7 @@ qemuMigrationSrcWaitForSpice(virDomainObjPtr vm)
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
 
-    if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_SEAMLESS_MIGRATION) ||
-        !priv->job.spiceMigration)
+    if (!priv->job.spiceMigration)
         return 0;
 
     VIR_DEBUG("Waiting for SPICE to finish migration");
diff --git a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
index 6c96e8b013..bd539e29e8 100644
--- a/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.5.3.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
index 038173c9b9..e2f1292378 100644
--- a/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.6.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
index f9ceeede38..0f04e2b363 100644
--- a/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_1.7.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
index f2fa718c1c..5398075a2f 100644
--- a/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.1.1.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
index e28b8e9313..8f3094d608 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.aarch64.xml
@@ -33,7 +33,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
index ea46831708..358e07ebf1 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
index 9ea1885e47..2837c20fac 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
index 355f5bbf6b..dea5f515d7 100644
--- a/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
index f5f4ee1393..38d2e40b20 100644
--- a/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.11.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.11.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.11.0.x86_64.xml
index f42bec715c..f0236053eb 100644
--- a/tests/qemucapabilitiesdata/caps_2.11.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.11.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
index 6d40702def..db165d9c8f 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
@@ -33,7 +33,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
index f893ffeccd..af8dfeb970 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
index 2502c1331b..eec39e5c9e 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index dd45ca2249..739f1df0da 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
index 1a7f19b9b6..bac4e00007 100644
--- a/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.4.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
index 338f9ea606..46b5ef74f6 100644
--- a/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.5.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
index df0c0dbc57..4e9c8862b9 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.aarch64.xml
@@ -35,7 +35,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
index d482c437ce..76eb5f5b28 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
index 23f9a60c95..149bb65c78 100644
--- a/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.6.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
index ccc4a738b4..911564e223 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
index 46bfab88d0..5a6ffd0edf 100644
--- a/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.7.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
index ea930b807d..8f3f141a25 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
index a0c8d68ee5..7bb9c6acb6 100644
--- a/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
index 1ac331a252..8dad5a0562 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
index c4f3387273..a20d0d9bf5 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml
@@ -19,7 +19,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
index 7ae0b81489..4692225957 100644
--- a/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
index c70e8909ce..41fec3e9c6 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.riscv32.xml b/tests/qemucapabilitiesdata/caps_3.0.0.riscv32.xml
index 17802b59e5..9574cdfc2d 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.riscv32.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.riscv32.xml
@@ -12,7 +12,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.riscv64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.riscv64.xml
index d06e2f8707..3451419434 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.riscv64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.riscv64.xml
@@ -12,7 +12,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.s390x.xml b/tests/qemucapabilitiesdata/caps_3.0.0.s390x.xml
index 87e9378248..fb5b22f667 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.s390x.xml
@@ -21,7 +21,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml
index 7d77e65790..63bf7f2193 100644
--- a/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
index 97dbec12cf..8ea7674e0e 100644
--- a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
@@ -32,7 +32,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml
index 49dfc4f9b3..2ebc6b7ee4 100644
--- a/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml b/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml
index 19b7b197d2..405d8ab47c 100644
--- a/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml
+++ b/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml
@@ -36,7 +36,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml
index 3ce74f9839..2e116976aa 100644
--- a/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml
@@ -36,7 +36,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml
index 3eb199d196..fa1711c2c8 100644
--- a/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml
@@ -42,7 +42,6 @@
   <flag name='scsi-disk.wwn'/>
   <flag name='seccomp-sandbox'/>
   <flag name='reboot-timeout'/>
-  <flag name='seamless-migration'/>
   <flag name='block-commit'/>
   <flag name='vnc'/>
   <flag name='drive-mirror'/>
diff --git a/tests/qemuxml2argvdata/channel-spicevmc.args b/tests/qemuxml2argvdata/channel-spicevmc.args
index f4ae7f6ef6..af8f3d55a7 100644
--- a/tests/qemuxml2argvdata/channel-spicevmc.args
+++ b/tests/qemuxml2argvdata/channel-spicevmc.args
@@ -27,6 +27,6 @@ server,nowait \
 -device virtserialport,bus=virtio-serial1.0,nr=3,chardev=charchannel0,\
 id=channel0,name=com.redhat.spice.0 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
-tls-channel=main \
+tls-channel=main,seamless-migration=on \
 -vga cirrus \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/controller-order.args b/tests/qemuxml2argvdata/controller-order.args
index f151ef1637..5ab74a6559 100644
--- a/tests/qemuxml2argvdata/controller-order.args
+++ b/tests/qemuxml2argvdata/controller-order.args
@@ -41,7 +41,8 @@ addr=0x3,bootindex=2 \
 -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,\
 id=channel0,name=com.redhat.spice.0 \
 -device usb-tablet,id=input0,bus=usb.0,port=1.2 \
--spice port=5901,tls-port=5902,addr=0.0.0.0,x509-dir=/etc/pki/libvirt-spice \
+-spice port=5901,tls-port=5902,addr=0.0.0.0,x509-dir=/etc/pki/libvirt-spice,\
+seamless-migration=on \
 -vga cirrus \
 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 \
 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-agent-file-xfer.args b/tests/qemuxml2argvdata/graphics-spice-agent-file-xfer.args
index 1f6dac2431..636ffcb28f 100644
--- a/tests/qemuxml2argvdata/graphics-spice-agent-file-xfer.args
+++ b/tests/qemuxml2argvdata/graphics-spice-agent-file-xfer.args
@@ -23,7 +23,8 @@ server,nowait \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
-tls-channel=main,plaintext-channel=inputs,disable-agent-file-xfer \
+tls-channel=main,plaintext-channel=inputs,disable-agent-file-xfer,\
+seamless-migration=on \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
 -global qxl-vga.vram_size=33554432 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-agentmouse.args b/tests/qemuxml2argvdata/graphics-spice-agentmouse.args
index 9eae477c85..b3ff22a729 100644
--- a/tests/qemuxml2argvdata/graphics-spice-agentmouse.args
+++ b/tests/qemuxml2argvdata/graphics-spice-agentmouse.args
@@ -27,6 +27,6 @@ server,nowait \
 -device virtserialport,bus=virtio-serial1.0,nr=3,chardev=charchannel0,\
 id=channel0,name=com.redhat.spice.0 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,agent-mouse=off,\
-x509-dir=/etc/pki/libvirt-spice,tls-channel=main \
+x509-dir=/etc/pki/libvirt-spice,tls-channel=main,seamless-migration=on \
 -vga cirrus \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/graphics-spice-auto-socket-cfg.args b/tests/qemuxml2argvdata/graphics-spice-auto-socket-cfg.args
index a184bd4a6c..b2a8decbea 100644
--- a/tests/qemuxml2argvdata/graphics-spice-auto-socket-cfg.args
+++ b/tests/qemuxml2argvdata/graphics-spice-auto-socket-cfg.args
@@ -20,5 +20,6 @@ server,nowait \
 -no-shutdown \
 -no-acpi \
 -usb \
--spice unix,addr=/tmp/lib/domain--1-QEMUGuest1/spice.sock \
+-spice unix,addr=/tmp/lib/domain--1-QEMUGuest1/spice.sock,\
+seamless-migration=on \
 -vga cirrus
diff --git a/tests/qemuxml2argvdata/graphics-spice-auto-socket.args b/tests/qemuxml2argvdata/graphics-spice-auto-socket.args
index a184bd4a6c..b2a8decbea 100644
--- a/tests/qemuxml2argvdata/graphics-spice-auto-socket.args
+++ b/tests/qemuxml2argvdata/graphics-spice-auto-socket.args
@@ -20,5 +20,6 @@ server,nowait \
 -no-shutdown \
 -no-acpi \
 -usb \
--spice unix,addr=/tmp/lib/domain--1-QEMUGuest1/spice.sock \
+-spice unix,addr=/tmp/lib/domain--1-QEMUGuest1/spice.sock,\
+seamless-migration=on \
 -vga cirrus
diff --git a/tests/qemuxml2argvdata/graphics-spice-compression.args b/tests/qemuxml2argvdata/graphics-spice-compression.args
index 5c81f55571..17857780b9 100644
--- a/tests/qemuxml2argvdata/graphics-spice-compression.args
+++ b/tests/qemuxml2argvdata/graphics-spice-compression.args
@@ -24,7 +24,8 @@ server,nowait \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
 image-compression=auto_glz,jpeg-wan-compression=auto,\
-zlib-glz-wan-compression=auto,playback-compression=on,streaming-video=filter \
+zlib-glz-wan-compression=auto,playback-compression=on,streaming-video=filter,\
+seamless-migration=on \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
 -global qxl-vga.vram_size=33554432 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-egl-headless.args b/tests/qemuxml2argvdata/graphics-spice-egl-headless.args
index c2297bc6cc..824d64fd0a 100644
--- a/tests/qemuxml2argvdata/graphics-spice-egl-headless.args
+++ b/tests/qemuxml2argvdata/graphics-spice-egl-headless.args
@@ -22,7 +22,7 @@ server,nowait \
 -usb \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
--spice port=5903,addr=127.0.0.1 \
+-spice port=5903,addr=127.0.0.1,seamless-migration=on \
 -display egl-headless \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-no-args.args b/tests/qemuxml2argvdata/graphics-spice-no-args.args
index e5390c1d4d..f427bab402 100644
--- a/tests/qemuxml2argvdata/graphics-spice-no-args.args
+++ b/tests/qemuxml2argvdata/graphics-spice-no-args.args
@@ -20,6 +20,6 @@ server,nowait \
 -no-shutdown \
 -no-acpi \
 -usb \
--spice port=0 \
+-spice port=0,seamless-migration=on \
 -vga cirrus \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/graphics-spice-qxl-vga.args b/tests/qemuxml2argvdata/graphics-spice-qxl-vga.args
index bc12f64a54..7acd7732e2 100644
--- a/tests/qemuxml2argvdata/graphics-spice-qxl-vga.args
+++ b/tests/qemuxml2argvdata/graphics-spice-qxl-vga.args
@@ -23,7 +23,7 @@ server,nowait \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
-tls-channel=main,plaintext-channel=inputs \
+tls-channel=main,plaintext-channel=inputs,seamless-migration=on \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
 -global qxl-vga.vram_size=33554432 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-sasl.args b/tests/qemuxml2argvdata/graphics-spice-sasl.args
index 95b41ab501..664911cb5a 100644
--- a/tests/qemuxml2argvdata/graphics-spice-sasl.args
+++ b/tests/qemuxml2argvdata/graphics-spice-sasl.args
@@ -24,7 +24,7 @@ server,nowait \
 -drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
 -spice port=5903,tls-port=5904,addr=127.0.0.1,sasl,\
-x509-dir=/etc/pki/libvirt-spice,tls-channel=default \
+x509-dir=/etc/pki/libvirt-spice,tls-channel=default,seamless-migration=on \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
 -global qxl-vga.vram_size=33554432 \
diff --git a/tests/qemuxml2argvdata/graphics-spice-socket.args b/tests/qemuxml2argvdata/graphics-spice-socket.args
index 053dbe7ce1..04e88aae98 100644
--- a/tests/qemuxml2argvdata/graphics-spice-socket.args
+++ b/tests/qemuxml2argvdata/graphics-spice-socket.args
@@ -20,5 +20,5 @@ server,nowait \
 -no-shutdown \
 -no-acpi \
 -usb \
--spice unix,addr=/tmp/spice.sock \
+-spice unix,addr=/tmp/spice.sock,seamless-migration=on \
 -vga cirrus
diff --git a/tests/qemuxml2argvdata/graphics-spice-timeout.args b/tests/qemuxml2argvdata/graphics-spice-timeout.args
index 9e7bcd4e33..e8cd35a946 100644
--- a/tests/qemuxml2argvdata/graphics-spice-timeout.args
+++ b/tests/qemuxml2argvdata/graphics-spice-timeout.args
@@ -34,7 +34,7 @@ id=drive-ide0-1-0,readonly=on \
 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:71:70:89,bus=pci.0,\
 addr=0x7 \
 -device usb-tablet,id=input0,bus=usb.0,port=1 \
--spice port=5900,addr=127.0.0.1 \
+-spice port=5900,addr=127.0.0.1,seamless-migration=on \
 -vga std \
 -device AC97,id=sound0,bus=pci.0,addr=0x3 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
diff --git a/tests/qemuxml2argvdata/graphics-spice-usb-redir.args b/tests/qemuxml2argvdata/graphics-spice-usb-redir.args
index 162a3d9b9f..0ae5cda562 100644
--- a/tests/qemuxml2argvdata/graphics-spice-usb-redir.args
+++ b/tests/qemuxml2argvdata/graphics-spice-usb-redir.args
@@ -28,7 +28,7 @@ addr=0x4 \
 tls-channel=main,plaintext-channel=inputs,tls-channel=usbredir,\
 image-compression=auto_glz,jpeg-wan-compression=auto,\
 zlib-glz-wan-compression=auto,playback-compression=on,streaming-video=filter,\
-disable-copy-paste \
+disable-copy-paste,seamless-migration=on \
 -vga cirrus \
 -chardev socket,id=charredir0,host=localhost,port=4000 \
 -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=1 \
diff --git a/tests/qemuxml2argvdata/graphics-spice.args b/tests/qemuxml2argvdata/graphics-spice.args
index c2d31af8cd..afe896673e 100644
--- a/tests/qemuxml2argvdata/graphics-spice.args
+++ b/tests/qemuxml2argvdata/graphics-spice.args
@@ -26,7 +26,7 @@ server,nowait \
 tls-channel=default,tls-channel=main,plaintext-channel=inputs,\
 image-compression=auto_glz,jpeg-wan-compression=auto,\
 zlib-glz-wan-compression=auto,playback-compression=on,streaming-video=filter,\
-disable-copy-paste,disable-agent-file-xfer \
+disable-copy-paste,disable-agent-file-xfer,seamless-migration=on \
 -vga qxl \
 -global qxl-vga.ram_size=67108864 \
 -global qxl-vga.vram_size=33554432 \
diff --git a/tests/qemuxml2argvdata/name-escape.args b/tests/qemuxml2argvdata/name-escape.args
index d0ccc01d21..b4cad57602 100644
--- a/tests/qemuxml2argvdata/name-escape.args
+++ b/tests/qemuxml2argvdata/name-escape.args
@@ -39,7 +39,7 @@ cert3=cert3,db=/etc/pki/nssdb,,foo,id=smartcard0,bus=ccid0.0 \
 -netdev user,guestfwd=tcp:10.0.2.1:4600-chardev:charchannel0,id=user-channel0 \
 -vnc unix:/tmp/lib/domain--1-foo=1,,bar=2/vnc.sock \
 -spice unix,addr=/tmp/lib/domain--1-foo=1,,bar=2/spice.sock,gl=on,\
-rendernode=/dev/dri/foo,,bar \
+rendernode=/dev/dri/foo,,bar,seamless-migration=on \
 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 \
 -drive file=iscsi://example.foo.org:3260/iqn.1992-01.com.example%3Amy,,\
 storage/1,if=none,format=raw,id=drive-hostdev0 \
diff --git a/tests/qemuxml2argvdata/q35-virt-manager-basic.args b/tests/qemuxml2argvdata/q35-virt-manager-basic.args
index 3cd0291c9b..e9b8c0b681 100644
--- a/tests/qemuxml2argvdata/q35-virt-manager-basic.args
+++ b/tests/qemuxml2argvdata/q35-virt-manager-basic.args
@@ -49,7 +49,7 @@ id=channel0,name=org.qemu.guest_agent.0 \
 id=channel1,name=com.redhat.spice.0 \
 -device usb-tablet,id=input0,bus=usb.0,port=1 \
 -spice port=5901,tls-port=5902,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
-image-compression=off \
+image-compression=off,seamless-migration=on \
 -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pcie.0,\
 addr=0x1 \
 -device ich9-intel-hda,id=sound0,bus=pcie.0,addr=0x1b \
diff --git a/tests/qemuxml2argvdata/serial-spiceport.args b/tests/qemuxml2argvdata/serial-spiceport.args
index f43c003645..e5d2da6442 100644
--- a/tests/qemuxml2argvdata/serial-spiceport.args
+++ b/tests/qemuxml2argvdata/serial-spiceport.args
@@ -25,7 +25,8 @@ server,nowait \
 -chardev spiceport,id=charserial0,name=org.qemu.console.serial.0 \
 -device isa-serial,chardev=charserial0,id=serial0 \
 -device usb-tablet,id=input0,bus=usb.0,port=1 \
--spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice \
+-spice port=5903,tls-port=5904,addr=127.0.0.1,x509-dir=/etc/pki/libvirt-spice,\
+seamless-migration=on \
 -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,\
 addr=0x2 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/video-virtio-gpu-spice-gl.args b/tests/qemuxml2argvdata/video-virtio-gpu-spice-gl.args
index be8af429c1..f1341e359d 100644
--- a/tests/qemuxml2argvdata/video-virtio-gpu-spice-gl.args
+++ b/tests/qemuxml2argvdata/video-virtio-gpu-spice-gl.args
@@ -23,6 +23,6 @@ server,nowait \
 -drive file=/var/lib/libvirt/images/QEMUGuest1,format=qcow2,if=none,\
 id=drive-ide0-0-0,cache=none \
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
--spice port=0,gl=on,rendernode=/dev/dri/foo \
+-spice port=0,gl=on,rendernode=/dev/dri/foo,seamless-migration=on \
 -device virtio-gpu-pci,id=video0,virgl=on,bus=pci.0,addr=0x2 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3