diff --git a/src/tests/gl_tests/MultisampledRenderToTextureTest.cpp b/src/tests/gl_tests/MultisampledRenderToTextureTest.cpp
index 37e5c67d35..834e4da732 100644
--- a/src/tests/gl_tests/MultisampledRenderToTextureTest.cpp
+++ b/src/tests/gl_tests/MultisampledRenderToTextureTest.cpp
@@ -4717,6 +4717,82 @@ TEST_P(MSRTTES3Test, UnresolveWithAndWithoutStencil)
     EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::white);
 }
 
+// Regression test: with an MSRTT color-only FBO (no depth/stencil), setting
+// glDrawBuffers(GL_NONE) and then drawing causes FramebufferVk::getSamplesImpl()
+// to derive samples=1 (because it iterates only enabled draw buffers), while
+// updateRenderPassDesc()/updateAttachmentsAndRenderTargets() iterate the
+// unfiltered color attachment mask and bind the implicit 4-sample VkImageView.
+// Under MSRTT emulation (no VK_EXT_multisampled_render_to_single_sampled), this
+// produces a VkRenderPass whose attachment[0].samples=VK_SAMPLE_COUNT_1_BIT and
+// a resolve attachment, but binds a VK_SAMPLE_COUNT_4_BIT VkImage in
+// vkCreateFramebuffer, violating VUID-VkFramebufferCreateInfo-pAttachments-00881,
+// VUID-VkSubpassDescription2-pResolveAttachments-03067, and
+// VUID-...-rasterizationSamples-06853.
+TEST_P(MSRTTES3Test, DrawBuffersNoneWithMSRTTColorOnly)
+{
+    ANGLE_SKIP_TEST_IF(!EnsureGLExtensionEnabled("GL_EXT_multisampled_render_to_texture"));
+
+    constexpr GLsizei kSize = 64;
+
+    // Create a 4-sample MSRTT color attachment with NO depth/stencil.
+    GLFramebuffer fboMS;
+    glBindFramebuffer(GL_FRAMEBUFFER, fboMS);
+
+    GLTexture textureMS;
+    glBindTexture(GL_TEXTURE_2D, textureMS);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
+                                         textureMS, 0, mTestSampleCount);
+    ASSERT_GL_NO_ERROR();
+    EXPECT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
+
+    glViewport(0, 0, kSize, kSize);
+
+    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
+    glUseProgram(drawColor);
+    GLint colorUniformLocation =
+        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
+    ASSERT_NE(colorUniformLocation, -1);
+    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
+
+    // First draw: populates a render pass with samples=4. This ensures the
+    // subsequent syncState early-return at FramebufferVk.cpp:~2847 fails because
+    // mRenderPassDesc.samples()(=4) != getSamples()(=1), forcing
+    // updateRenderPassDesc() to re-run with the divergent state.
+    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.5f);
+    ASSERT_GL_NO_ERROR();
+    // Break the render pass so the next draw starts a new one.
+    glFinish();
+
+    // Disable all draw buffers. The MSRTT attachment is still bound to
+    // GL_COLOR_ATTACHMENT0, so the FBO remains complete, but
+    // mState.getEnabledDrawBuffers() is now empty.
+    const GLenum kNone[] = {GL_NONE};
+    glDrawBuffers(1, kNone);
+    ASSERT_GL_NO_ERROR();
+
+    // FBO must still be complete (frontend completeness ignores draw-buffer state).
+    EXPECT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
+
+    // Second draw: triggers FramebufferVk::syncState ->
+    //   mRasterizationSamples = max(getSamplesImpl(),1) = 1
+    //   updateRenderPassDesc():
+    //     setSamples(1)
+    //     packs color0 + resolve from UNFILTERED getColorAttachmentsMask()
+    //     isRenderToTexture derived from FILTERED getEnabledDrawBuffers() = false
+    //   updateAttachmentsAndRenderTargets(): binds 4-sample VkImageView
+    // -> startNewRenderPass -> vkCreateRenderPass2 (attach[0].samples=1, resolve
+    //    present) + vkCreateFramebuffer (pAttachments[0]=4-sample view)
+    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.5f);
+    ASSERT_GL_NO_ERROR();
+
+    // Force submission so any driver-side undefined behavior surfaces.
+    glFinish();
+    ASSERT_GL_NO_ERROR();
+}
+
 ANGLE_INSTANTIATE_TEST_COMBINE_1(
     MSRTTTest,
     PrintToStringParamName,