diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 9e01226e18..f7d527464c 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -29,6 +29,7 @@
 #include "qapi/visitor.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/numa.h"
+#include "sysemu/qtest.h"
 #include "hw/hw.h"
 #include "qemu/log.h"
 #include "hw/fw-path-provider.h"
@@ -1711,6 +1712,16 @@ static void spapr_machine_reset(void)
      */
     spapr_irq_reset(spapr, &error_fatal);
 
+    /*
+     * There is no CAS under qtest. Simulate one to please the code that
+     * depends on spapr->ov5_cas. This is especially needed to test device
+     * unplug, so we do that before resetting the DRCs.
+     */
+    if (qtest_enabled()) {
+        spapr_ovec_cleanup(spapr->ov5_cas);
+        spapr->ov5_cas = spapr_ovec_clone(spapr->ov5);
+    }
+
     /* DRC reset may cause a device to be unplugged. This will cause troubles
      * if this device is used by another device (eg, a running vhost backend
      * will crash QEMU if the DIMM holding the vring goes away). To avoid such