diff --git a/tools/tests/x86_emulator/x86_emulate.c b/tools/tests/x86_emulator/x86_emulate.c
index cea0595ae2..79661d5c2b 100644
--- a/tools/tests/x86_emulator/x86_emulate.c
+++ b/tools/tests/x86_emulator/x86_emulate.c
@@ -89,6 +89,13 @@ int emul_test_cpuid(
         res->c |= 1U << 22;
     }
 
+    /*
+     * The emulator doesn't itself use CLZERO, so we can always run the
+     * respective test(s).
+     */
+    if ( leaf == 0x80000008 )
+        res->b |= 1U << 0;
+
     return X86EMUL_OKAY;
 }