diff --git a/src/common/framework/fixture.ts b/src/common/framework/fixture.ts
index 381d60ba047a..795532406bd2 100644
--- a/src/common/framework/fixture.ts
+++ b/src/common/framework/fixture.ts
@@ -1,6 +1,6 @@
 import { TestCaseRecorder } from '../internal/logging/test_case_recorder.js';
 import { JSONWithUndefined } from '../internal/params_utils.js';
-import { assert, unreachable } from '../util/util.js';
+import { assert, ExceptionCheckOptions, unreachable } from '../util/util.js';
 
 export class SkipTestCase extends Error {}
 export class UnexpectedPassError extends Error {}
@@ -237,16 +237,26 @@ export class Fixture<S extends SubcaseBatchState = SubcaseBatchState> {
   }
 
   /** Expect that the provided promise rejects, with the provided exception name. */
-  shouldReject(expectedName: string, p: Promise<unknown>, msg?: string): void {
+  shouldReject(
+    expectedName: string,
+    p: Promise<unknown>,
+    { allowMissingStack = false, message }: ExceptionCheckOptions = {}
+  ): void {
     this.eventualAsyncExpectation(async niceStack => {
-      const m = msg ? ': ' + msg : '';
+      const m = message ? ': ' + message : '';
       try {
         await p;
         niceStack.message = 'DID NOT REJECT' + m;
         this.rec.expectationFailed(niceStack);
       } catch (ex) {
-        niceStack.message = 'rejected as expected' + m;
         this.expectErrorValue(expectedName, ex, niceStack);
+        if (!allowMissingStack) {
+          if (!(ex instanceof Error && typeof ex.stack === 'string')) {
+            const exMessage = ex instanceof Error ? ex.message : '?';
+            niceStack.message = `rejected as expected, but missing stack (${exMessage})${m}`;
+            this.rec.expectationFailed(niceStack);
+          }
+        }
       }
     });
   }
@@ -257,8 +267,12 @@ export class Fixture<S extends SubcaseBatchState = SubcaseBatchState> {
    *
    * MAINTENANCE_TODO: Change to `string | false` so the exception name is always checked.
    */
-  shouldThrow(expectedError: string | boolean, fn: () => void, msg?: string): void {
-    const m = msg ? ': ' + msg : '';
+  shouldThrow(
+    expectedError: string | boolean,
+    fn: () => void,
+    { allowMissingStack = false, message }: ExceptionCheckOptions = {}
+  ) {
+    const m = message ? ': ' + message : '';
     try {
       fn();
       if (expectedError === false) {
@@ -271,6 +285,11 @@ export class Fixture<S extends SubcaseBatchState = SubcaseBatchState> {
         this.rec.expectationFailed(new Error('threw unexpectedly' + m));
       } else {
         this.expectErrorValue(expectedError, ex, new Error(m));
+        if (!allowMissingStack) {
+          if (!(ex instanceof Error && typeof ex.stack === 'string')) {
+            this.rec.expectationFailed(new Error('threw as expected, but missing stack' + m));
+          }
+        }
       }
     }
   }
diff --git a/src/common/util/util.ts b/src/common/util/util.ts
index be109fc9d422..1da380036382 100644
--- a/src/common/util/util.ts
+++ b/src/common/util/util.ts
@@ -47,15 +47,29 @@ export function assertOK<T>(value: Error | T): T {
   return value;
 }
 
+/** Options for assertReject, shouldReject, and friends. */
+export type ExceptionCheckOptions = { allowMissingStack?: boolean; message?: string };
+
 /**
  * Resolves if the provided promise rejects; rejects if it does not.
  */
-export async function assertReject(p: Promise<unknown>, msg?: string): Promise<void> {
+export async function assertReject(
+  expectedName: string,
+  p: Promise<unknown>,
+  { allowMissingStack = false, message }: ExceptionCheckOptions = {}
+): Promise<void> {
   try {
     await p;
-    unreachable(msg);
+    unreachable(message);
   } catch (ex) {
-    // Assertion OK
+    // Asserted as expected
+    if (!allowMissingStack) {
+      const m = message ? ` (${message})` : '';
+      assert(
+        ex instanceof Error && typeof ex.stack === 'string',
+        'threw as expected, but missing stack' + m
+      );
+    }
   }
 }
 
diff --git a/src/unittests/loaders_and_trees.spec.ts b/src/unittests/loaders_and_trees.spec.ts
index c7ff1fa43a84..b396b0525940 100644
--- a/src/unittests/loaders_and_trees.spec.ts
+++ b/src/unittests/loaders_and_trees.spec.ts
@@ -703,7 +703,10 @@ async function testIterateCollapsed(
     subqueriesToExpand: expectations,
   });
   if (expectedResult === 'throws') {
-    t.shouldReject('Error', treePromise, 'loadTree should have thrown Error');
+    t.shouldReject('Error', treePromise, {
+      // Some errors here use StacklessError to print nicer command line outputs.
+      allowMissingStack: true,
+    });
     return;
   }
   const tree = await treePromise;
diff --git a/src/unittests/test_group.spec.ts b/src/unittests/test_group.spec.ts
index 8e1129411c74..526f577c9edf 100644
--- a/src/unittests/test_group.spec.ts
+++ b/src/unittests/test_group.spec.ts
@@ -206,7 +206,7 @@ g.test('invalid_test_name').fn(t => {
       () => {
         g.test(name).fn(() => {});
       },
-      name
+      { message: name }
     );
   }
 });
diff --git a/src/webgpu/api/operation/adapter/requestDevice.spec.ts b/src/webgpu/api/operation/adapter/requestDevice.spec.ts
index 7d930a5e19df..314da6356eb7 100644
--- a/src/webgpu/api/operation/adapter/requestDevice.spec.ts
+++ b/src/webgpu/api/operation/adapter/requestDevice.spec.ts
@@ -118,6 +118,7 @@ g.test('stale')
         // Cause a type error by requesting with an unknown feature.
         if (awaitInitialError) {
           await assertReject(
+            'TypeError',
             adapter.requestDevice({ requiredFeatures: ['unknown-feature' as GPUFeatureName] })
           );
         } else {
@@ -131,6 +132,7 @@ g.test('stale')
         // Cause an operation error by requesting with an alignment limit that is not a power of 2.
         if (awaitInitialError) {
           await assertReject(
+            'OperationError',
             adapter.requestDevice({ requiredLimits: { minUniformBufferOffsetAlignment: 255 } })
           );
         } else {
diff --git a/src/webgpu/api/validation/buffer/mapping.spec.ts b/src/webgpu/api/validation/buffer/mapping.spec.ts
index c6f3c782af6d..58d7f2767aee 100644
--- a/src/webgpu/api/validation/buffer/mapping.spec.ts
+++ b/src/webgpu/api/validation/buffer/mapping.spec.ts
@@ -45,6 +45,7 @@ class F extends ValidationTest {
         assert(expectation.rejectName === null, 'mapAsync unexpectedly passed');
       } catch (ex) {
         assert(ex instanceof Error, 'mapAsync rejected with non-error');
+        assert(typeof ex.stack === 'string', 'mapAsync rejected without a stack');
         assert(expectation.rejectName === ex.name, `mapAsync rejected unexpectedly with: ${ex}`);
         assert(
           expectation.earlyRejection === rejectedEarly,
diff --git a/src/webgpu/api/validation/capability_checks/features/texture_formats.spec.ts b/src/webgpu/api/validation/capability_checks/features/texture_formats.spec.ts
index 8654bc6feba6..eb7005dd29d0 100644
--- a/src/webgpu/api/validation/capability_checks/features/texture_formats.spec.ts
+++ b/src/webgpu/api/validation/capability_checks/features/texture_formats.spec.ts
@@ -274,6 +274,7 @@ g.test('color_target_state')
   )
   .params(u =>
     u
+      .combine('isAsync', [false, true])
       .combine('format', kOptionalTextureFormats)
       .filter(t => !!kTextureFormatInfo[t.format].colorRender)
       .combine('enable_required_feature', [true, false])
@@ -287,10 +288,12 @@ g.test('color_target_state')
     }
   })
   .fn(t => {
-    const { format, enable_required_feature } = t.params;
+    const { isAsync, format, enable_required_feature } = t.params;
 
-    t.shouldThrow(enable_required_feature ? false : 'TypeError', () => {
-      t.device.createRenderPipeline({
+    t.doCreateRenderPipelineTest(
+      isAsync,
+      enable_required_feature,
+      {
         layout: 'auto',
         vertex: {
           module: t.device.createShaderModule({
@@ -313,8 +316,9 @@ g.test('color_target_state')
           entryPoint: 'main',
           targets: [{ format }],
         },
-      });
-    });
+      },
+      'TypeError'
+    );
   });
 
 g.test('depth_stencil_state')
@@ -326,6 +330,7 @@ g.test('depth_stencil_state')
   )
   .params(u =>
     u
+      .combine('isAsync', [false, true])
       .combine('format', kOptionalTextureFormats)
       .filter(t => !!(kTextureFormatInfo[t.format].depth || kTextureFormatInfo[t.format].stencil))
       .combine('enable_required_feature', [true, false])
@@ -339,10 +344,12 @@ g.test('depth_stencil_state')
     }
   })
   .fn(t => {
-    const { format, enable_required_feature } = t.params;
+    const { isAsync, format, enable_required_feature } = t.params;
 
-    t.shouldThrow(enable_required_feature ? false : 'TypeError', () => {
-      t.device.createRenderPipeline({
+    t.doCreateRenderPipelineTest(
+      isAsync,
+      enable_required_feature,
+      {
         layout: 'auto',
         vertex: {
           module: t.device.createShaderModule({
@@ -370,8 +377,9 @@ g.test('depth_stencil_state')
           entryPoint: 'main',
           targets: [{ format: 'rgba8unorm' }],
         },
-      });
-    });
+      },
+      'TypeError'
+    );
   });
 
 g.test('render_bundle_encoder_descriptor_color_format')
diff --git a/src/webgpu/api/validation/capability_checks/limits/limit_utils.ts b/src/webgpu/api/validation/capability_checks/limits/limit_utils.ts
index f6b0f96aa805..47a5a468d7d1 100644
--- a/src/webgpu/api/validation/capability_checks/limits/limit_utils.ts
+++ b/src/webgpu/api/validation/capability_checks/limits/limit_utils.ts
@@ -330,7 +330,9 @@ export class LimitTestsImpl extends GPUTestBase {
     requiredFeatures?: GPUFeatureName[]
   ) {
     if (shouldReject) {
-      this.shouldReject('OperationError', adapter.requestDevice({ requiredLimits }));
+      this.shouldReject('OperationError', adapter.requestDevice({ requiredLimits }), {
+        allowMissingStack: true,
+      });
       return undefined;
     } else {
       return await adapter.requestDevice({ requiredLimits, requiredFeatures });
@@ -562,12 +564,12 @@ export class LimitTestsImpl extends GPUTestBase {
     expectedName: string,
     p: Promise<unknown>,
     shouldReject: boolean,
-    msg?: string
+    message?: string
   ): Promise<void> {
     if (shouldReject) {
-      this.shouldReject(expectedName, p, msg);
+      this.shouldReject(expectedName, p, { message });
     } else {
-      this.shouldResolve(p, msg);
+      this.shouldResolve(p, message);
     }
 
     // We need to explicitly wait for the promise because the device may be
diff --git a/src/webgpu/examples.spec.ts b/src/webgpu/examples.spec.ts
index 35969543741f..4864393eca91 100644
--- a/src/webgpu/examples.spec.ts
+++ b/src/webgpu/examples.spec.ts
@@ -47,7 +47,7 @@ g.test('basic').fn(t => {
       throw new TypeError();
     },
     // Log message.
-    'function should throw Error'
+    { message: 'function should throw Error' }
   );
 });
 
@@ -59,17 +59,17 @@ g.test('basic,async').fn(t => {
     // Promise expected to reject.
     Promise.reject(new TypeError()),
     // Log message.
-    'Promise.reject should reject'
+    { message: 'Promise.reject should reject' }
   );
 
-  // Promise can also be an IIFE.
+  // Promise can also be an IIFE (immediately-invoked function expression).
   t.shouldReject(
     'TypeError',
     // eslint-disable-next-line @typescript-eslint/require-await
     (async () => {
       throw new TypeError();
     })(),
-    'Promise.reject should reject'
+    { message: 'Promise.reject should reject' }
   );
 });
 
diff --git a/src/webgpu/util/device_pool.ts b/src/webgpu/util/device_pool.ts
index e8584df19613..843d6dc83e1a 100644
--- a/src/webgpu/util/device_pool.ts
+++ b/src/webgpu/util/device_pool.ts
@@ -378,10 +378,10 @@ class DeviceHolder implements DeviceProvider {
       await this.device.queue.onSubmittedWorkDone();
     }
 
-    await assertReject(
-      this.device.popErrorScope(),
-      'There was an extra error scope on the stack after a test'
-    );
+    await assertReject('OperationError', this.device.popErrorScope(), {
+      allowMissingStack: true,
+      message: 'There was an extra error scope on the stack after a test',
+    });
 
     if (gpuOutOfMemoryError !== null) {
       assert(gpuOutOfMemoryError instanceof GPUOutOfMemoryError);