diff --git a/src/tests/gl_tests/RobustResourceInitTest.cpp b/src/tests/gl_tests/RobustResourceInitTest.cpp
index 693560394e..64e431751d 100644
--- a/src/tests/gl_tests/RobustResourceInitTest.cpp
+++ b/src/tests/gl_tests/RobustResourceInitTest.cpp
@@ -809,6 +809,88 @@ TEST_P(RobustResourceInitTestES3, DrawThenInvalidateThenReadBack)
     EXPECT_GL_NO_ERROR();
 }
 
+// A full clear marks the attachment as Initialized in the frontend before the
+// backend has actually written texture memory (the clear may be implemented as
+// a render-pass loadAction=Clear). Calling invalidate immediately after must
+// not let allocation-time GPU heap contents leak through to readPixels.
+TEST_P(RobustResourceInitTestES3, ClearThenInvalidateThenReadBack)
+{
+    ANGLE_SKIP_TEST_IF(!hasGLExtension());
+
+    GLTexture tex;
+    glBindTexture(GL_TEXTURE_2D, tex);
+    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, kWidth, kHeight);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+    GLFramebuffer fbo;
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
+    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
+
+    // Full unmasked unscissored clear: partialClearNeedsInit() == false, so the
+    // frontend resets mResourceNeedsInit *before* the data lands in texture
+    // backing memory.
+    glDisable(GL_SCISSOR_TEST);
+    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    glClearColor(0, 0, 0, 0);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    // Backend may set storeAction = DontCare on the live encoder, discarding
+    // the only write that would have initialised the texture.
+    std::array<GLenum, 1> attachments = {GL_COLOR_ATTACHMENT0};
+    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, attachments.data());
+
+    // ensureReadAttachmentsInitialized early-exits because mResourceNeedsInit
+    // was already cleared by the clear() above. Robust init must still ensure
+    // the readback is the clear colour (or the robust init value).
+    EXPECT_PIXEL_RECT_EQ(0, 0, kWidth, kHeight, GLColor::transparentBlack);
+    EXPECT_GL_NO_ERROR();
+}
+
+// Same as above but with a 1-pixel draw between invalidate and readPixels.
+// On Metal the next render pass inherits loadAction=DontCare, storeAction=Store
+// so stale on-chip tile memory is *stored* into the texture and read back.
+TEST_P(RobustResourceInitTestES3, ClearThenInvalidateThenDrawThenReadBack)
+{
+    ANGLE_SKIP_TEST_IF(!hasGLExtension());
+
+    GLTexture tex;
+    glBindTexture(GL_TEXTURE_2D, tex);
+    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, kWidth, kHeight);
+
+    GLFramebuffer fbo;
+    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);
+    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
+
+    glDisable(GL_SCISSOR_TEST);
+    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+    glClearColor(0, 0, 0, 0);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    std::array<GLenum, 1> attachments = {GL_COLOR_ATTACHMENT0};
+    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, attachments.data());
+
+    // 1-pixel point at the centre. Everywhere else must be transparentBlack.
+    constexpr char kVS[] = R"(#version 300 es
+void main(){gl_Position=vec4(0.0,0.0,0.0,1.0);gl_PointSize=1.0;})";
+    constexpr char kFS[] = R"(#version 300 es
+precision highp float; out vec4 c; void main(){c=vec4(0.0);})";
+    ANGLE_GL_PROGRAM(prog, kVS, kFS);
+    glUseProgram(prog);
+    glViewport(0, 0, kWidth, kHeight);
+    glDrawArrays(GL_POINTS, 0, 1);
+
+    std::vector<GLColor> pixels(kWidth * kHeight);
+    glReadPixels(0, 0, kWidth, kHeight, GL_RGBA, GL_UNSIGNED_BYTE, pixels.data());
+    EXPECT_GL_NO_ERROR();
+    for (const GLColor &p : pixels)
+    {
+        ASSERT_EQ(p, GLColor::transparentBlack) << "leaked: " << p;
+    }
+}
+
 // Calling invalidate after draw should either read back the result of the draw call (invalidate
 // didn't happen) or the init depth/stencil values.
 TEST_P(RobustResourceInitTestES3, DrawThenInvalidateThenReadBackDepthStencil)