diff --git a/graphics/composer/2.3/IComposerClient.hal b/graphics/composer/2.3/IComposerClient.hal
index 1eea306..4d6f78f 100644
--- a/graphics/composer/2.3/IComposerClient.hal
+++ b/graphics/composer/2.3/IComposerClient.hal
@@ -502,6 +502,10 @@
                        float minLuminance);
 
     /**
+     * Use getDisplayCapabilities instead. If brightness is supported, must return
+     * DisplayCapability::BRIGHTNESS as one of the display capabilities via getDisplayCapabilities.
+     * Only use getDisplayCapabilities as the source of truth to query brightness support.
+     *
      * Gets whether brightness operations are supported on a display.
      *
      * @param display
diff --git a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
index 56b2e33..d51c30a 100644
--- a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
+++ b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
@@ -572,6 +572,10 @@
             std::find(capabilities.begin(), capabilities.end(),
                       IComposerClient::DisplayCapability::DOZE) != capabilities.end();
     EXPECT_EQ(mComposerClient->getDozeSupport(mPrimaryDisplay), hasDozeSupport);
+    bool hasBrightnessSupport =
+            std::find(capabilities.begin(), capabilities.end(),
+                      IComposerClient::DisplayCapability::BRIGHTNESS) != capabilities.end();
+    EXPECT_EQ(mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay), hasBrightnessSupport);
 }
 
 TEST_F(GraphicsComposerHidlTest, getDisplayCapabilitiesBadDisplay) {
@@ -604,24 +608,18 @@
 }
 
 /*
- * Test that getDisplayBrightnessSupport works as expected.
+ * Test that if brightness operations are supported, setDisplayBrightness works as expected.
  */
-TEST_F(GraphicsComposerHidlTest, getDisplayBrightnessSupport) {
+TEST_F(GraphicsComposerHidlTest, setDisplayBrightness) {
     std::vector<IComposerClient::DisplayCapability> capabilities;
     const auto error = mComposerClient->getDisplayCapabilities(mPrimaryDisplay, &capabilities);
     ASSERT_EQ(Error::NONE, error);
     bool brightnessSupport =
             std::find(capabilities.begin(), capabilities.end(),
                       IComposerClient::DisplayCapability::BRIGHTNESS) != capabilities.end();
-    EXPECT_EQ(mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay), brightnessSupport);
-}
-
-/*
- * Test that if brightness operations are supported, setDisplayBrightness works as expected.
- */
-TEST_F(GraphicsComposerHidlTest, setDisplayBrightness) {
-    if (!mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay)) {
-        EXPECT_EQ(mComposerClient->setDisplayBrightness(mPrimaryDisplay, 0.5f), Error::UNSUPPORTED);
+    if (!brightnessSupport) {
+        EXPECT_EQ(mComposerClient->getRaw()->setDisplayBrightness(mPrimaryDisplay, 0.5f),
+                  Error::UNSUPPORTED);
         GTEST_SUCCEED() << "Brightness operations are not supported";
         return;
     }