diff --git a/src/webgpu/shader/validation/expression/call/builtin/dot4I8Packed.spec.ts b/src/webgpu/shader/validation/expression/call/builtin/dot4I8Packed.spec.ts
index 12a73ae0c602..56c5cf5403eb 100644
--- a/src/webgpu/shader/validation/expression/call/builtin/dot4I8Packed.spec.ts
+++ b/src/webgpu/shader/validation/expression/call/builtin/dot4I8Packed.spec.ts
@@ -19,6 +19,8 @@ const kBadArgs = {
   '1f32': '(1u,2f)',
   '1bool': '(1u,true)',
   '1vec2u': '(1u,vec2u())',
+  bool_bool: '(false,true)',
+  bool2_bool2: '(vec2<bool>(),vec2(false,true))',
 };
 
 export const g = makeTestGroup(ShaderValidationTest);
diff --git a/src/webgpu/shader/validation/expression/call/builtin/dot4U8Packed.spec.ts b/src/webgpu/shader/validation/expression/call/builtin/dot4U8Packed.spec.ts
index 18fb97707da1..1d240af5a81b 100644
--- a/src/webgpu/shader/validation/expression/call/builtin/dot4U8Packed.spec.ts
+++ b/src/webgpu/shader/validation/expression/call/builtin/dot4U8Packed.spec.ts
@@ -19,6 +19,8 @@ const kBadArgs = {
   '1f32': '(1u,2f)',
   '1bool': '(1u,true)',
   '1vec2u': '(1u,vec2u())',
+  bool_bool: '(false,true)',
+  bool2_bool2: '(vec2<bool>(),vec2(false,true))',
 };
 
 export const g = makeTestGroup(ShaderValidationTest);