diff --git a/src/tests/end2end/D3D12ResourceWrappingTests.cpp b/src/tests/end2end/D3D12ResourceWrappingTests.cpp
index 72de44c07c..b8d3c65dc5 100644
--- a/src/tests/end2end/D3D12ResourceWrappingTests.cpp
+++ b/src/tests/end2end/D3D12ResourceWrappingTests.cpp
@@ -439,6 +439,7 @@ TEST_P(D3D12SharedHandleUsageTests, ClearInD3D11CopyAndReadbackInD3D12) {
     ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
     WrapAndClearD3D11Texture(&baseDawnDescriptor, &baseD3dDescriptor, &dawnSrcTexture, clearColor,
                              &d3d11Texture, &dxgiKeyedMutex);
+    ASSERT_NE(dawnSrcTexture.Get(), nullptr);
 
     // Create a texture on the device and copy the source texture to it.
     wgpu::Texture dawnCopyDestTexture = device.CreateTexture(&baseDawnDescriptor);
@@ -462,6 +463,7 @@ TEST_P(D3D12SharedHandleUsageTests, ClearInD3D11ReadbackInD3D12) {
     ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
     WrapAndClearD3D11Texture(&baseDawnDescriptor, &baseD3dDescriptor, &dawnTexture, clearColor,
                              &d3d11Texture, &dxgiKeyedMutex);
+    ASSERT_NE(dawnTexture.Get(), nullptr);
 
     // Readback the destination texture and ensure it contains the colors we used
     // to clear the source texture on the D3D device.
@@ -482,6 +484,7 @@ TEST_P(D3D12SharedHandleUsageTests, ClearInD3D12ReadbackInD3D11) {
     ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
     WrapAndClearD3D11Texture(&baseDawnDescriptor, &baseD3dDescriptor, &dawnTexture, d3d11ClearColor,
                              &d3d11Texture, &dxgiKeyedMutex);
+    ASSERT_NE(dawnTexture.Get(), nullptr);
 
     const wgpu::Color d3d12ClearColor{0.0f, 0.0f, 1.0f, 1.0f};
     ClearImage(dawnTexture, d3d12ClearColor);
@@ -507,6 +510,7 @@ TEST_P(D3D12SharedHandleUsageTests, ClearTwiceInD3D12ReadbackInD3D11) {
     ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
     WrapAndClearD3D11Texture(&baseDawnDescriptor, &baseD3dDescriptor, &dawnTexture, d3d11ClearColor,
                              &d3d11Texture, &dxgiKeyedMutex);
+    ASSERT_NE(dawnTexture.Get(), nullptr);
 
     const wgpu::Color d3d12ClearColor1{0.0f, 0.0f, 1.0f, 1.0f};
     ClearImage(dawnTexture, d3d12ClearColor1);
@@ -534,6 +538,7 @@ TEST_P(D3D12SharedHandleUsageTests, UninitializedTextureIsCleared) {
     ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
     WrapAndClearD3D11Texture(&baseDawnDescriptor, &baseD3dDescriptor, &dawnTexture, clearColor,
                              &d3d11Texture, &dxgiKeyedMutex, false);
+    ASSERT_NE(dawnTexture.Get(), nullptr);
 
     // Readback the destination texture and ensure it contains the colors we used
     // to clear the source texture on the D3D device.
diff --git a/src/tests/end2end/D3D12VideoViewsTests.cpp b/src/tests/end2end/D3D12VideoViewsTests.cpp
index 6f7938de58..d460433c27 100644
--- a/src/tests/end2end/D3D12VideoViewsTests.cpp
+++ b/src/tests/end2end/D3D12VideoViewsTests.cpp
@@ -189,13 +189,13 @@ namespace {
             // texture is left uninitialized. This is required for D3D11 and D3D12 interop.
             ComPtr<IDXGIKeyedMutex> dxgiKeyedMutex;
             hr = d3d11Texture.As(&dxgiKeyedMutex);
-            EXPECT_EQ(hr, S_OK);
+            ASSERT_EQ(hr, S_OK);
 
             hr = dxgiKeyedMutex->AcquireSync(0, INFINITE);
-            EXPECT_EQ(hr, S_OK);
+            ASSERT_EQ(hr, S_OK);
 
             hr = dxgiKeyedMutex->ReleaseSync(1);
-            EXPECT_EQ(hr, S_OK);
+            ASSERT_EQ(hr, S_OK);
 
             // Open the DX11 texture in Dawn from the shared handle and return it as a WebGPU
             // texture.
@@ -266,6 +266,7 @@ TEST_P(D3D12VideoViewsTests, NV12SampleYtoR) {
     wgpu::Texture wgpuTexture;
     CreateVideoTextureForTest(wgpu::TextureFormat::R8BG8Biplanar420Unorm,
                               wgpu::TextureUsage::Sampled, /*isCheckerboard*/ false, &wgpuTexture);
+    ASSERT_NE(wgpuTexture.Get(), nullptr);
 
     wgpu::TextureViewDescriptor viewDesc;
     viewDesc.aspect = wgpu::TextureAspect::Plane0Only;
@@ -318,6 +319,7 @@ TEST_P(D3D12VideoViewsTests, NV12SampleUVtoRG) {
     wgpu::Texture wgpuTexture;
     CreateVideoTextureForTest(wgpu::TextureFormat::R8BG8Biplanar420Unorm,
                               wgpu::TextureUsage::Sampled, /*isCheckerboard*/ false, &wgpuTexture);
+    ASSERT_NE(wgpuTexture.Get(), nullptr);
 
     wgpu::TextureViewDescriptor viewDesc;
     viewDesc.aspect = wgpu::TextureAspect::Plane1Only;
@@ -371,6 +373,7 @@ TEST_P(D3D12VideoViewsTests, NV12SampleYUVtoRGB) {
     wgpu::Texture wgpuTexture;
     CreateVideoTextureForTest(wgpu::TextureFormat::R8BG8Biplanar420Unorm,
                               wgpu::TextureUsage::Sampled, /*isCheckerboard*/ true, &wgpuTexture);
+    ASSERT_NE(wgpuTexture.Get(), nullptr);
 
     wgpu::TextureViewDescriptor lumaViewDesc;
     lumaViewDesc.aspect = wgpu::TextureAspect::Plane0Only;