diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 7d8796f..8deff85 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -101,6 +101,7 @@
         "LayerTestUtils.cpp",
         "MessageQueueTest.cpp",
         "PowerAdvisorTest.cpp",
+        "SmallAreaDetectionAllowMappingsTest.cpp",
         "SurfaceFlinger_CreateDisplayTest.cpp",
         "SurfaceFlinger_DestroyDisplayTest.cpp",
         "SurfaceFlinger_DisplayModeSwitching.cpp",
diff --git a/services/surfaceflinger/tests/unittests/SmallAreaDetectionAllowMappingsTest.cpp b/services/surfaceflinger/tests/unittests/SmallAreaDetectionAllowMappingsTest.cpp
new file mode 100644
index 0000000..b910485
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/SmallAreaDetectionAllowMappingsTest.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "SmallAreaDetectionAllowMappingsTest"
+
+#include <gtest/gtest.h>
+
+#include "Scheduler/SmallAreaDetectionAllowMappings.h"
+
+namespace android::scheduler {
+
+class SmallAreaDetectionMappingsAllowTest : public testing::Test {
+protected:
+    SmallAreaDetectionAllowMappings mMappings;
+};
+
+namespace {
+TEST_F(SmallAreaDetectionMappingsAllowTest, testUpdate) {
+    const uid_t uid1 = 10100;
+    const uid_t uid2 = 10101;
+    const float threshold1 = 0.05f;
+    const float threshold2 = 0.07f;
+    std::vector<std::pair<uid_t, float>> mappings;
+    mappings.reserve(2);
+    mappings.push_back(std::make_pair(uid1, threshold1));
+    mappings.push_back(std::make_pair(uid2, threshold2));
+
+    mMappings.update(mappings);
+    ASSERT_EQ(mMappings.getThresholdForUid(uid1).value(), threshold1);
+    ASSERT_EQ(mMappings.getThresholdForUid(uid2).value(), threshold2);
+}
+
+TEST_F(SmallAreaDetectionMappingsAllowTest, testSetThesholdForUid) {
+    const uid_t uid = 10111;
+    const float threshold = 0.05f;
+
+    mMappings.setThesholdForUid(uid, threshold);
+    ASSERT_EQ(mMappings.getThresholdForUid(uid), threshold);
+}
+
+TEST_F(SmallAreaDetectionMappingsAllowTest, testUidNotInTheMappings) {
+    const uid_t uid = 10222;
+    ASSERT_EQ(mMappings.getThresholdForUid(uid), std::nullopt);
+}
+
+} // namespace
+} // namespace android::scheduler