diff --git a/tests/asm/meson.build b/tests/asm/meson.build
index 64aef11..89b88bd 100644
--- a/tests/asm/meson.build
+++ b/tests/asm/meson.build
@@ -182,6 +182,7 @@ asm_tests = {
     'read-ps-ex-1': {},
     'read-ps-ex-unaligned-1': { 'should_fail': true },
     'write-ps-ex-1': {},
+    'zero-wsz-1': {},
   },
 }
 
diff --git a/tests/asm/syscall/zero-wsz-1.S b/tests/asm/syscall/zero-wsz-1.S
new file mode 100644
index 0000000..d6c9fa7
--- /dev/null
+++ b/tests/asm/syscall/zero-wsz-1.S
@@ -0,0 +1,9 @@
+#include "test_start.S"
+
+    {
+        setwd wsz=8, nfx=1
+        sdisp %ctpr1, 0x3
+    }
+        call %ctpr1, wbs=8
+
+#include "test_end.S"