diff --git a/tests/expression/1.0/IExpressionExt.hal b/tests/expression/1.0/IExpressionExt.hal
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+package android.hardware.tests.expression@1.0;
+
+import IExpression;
+
+interface IExpressionExt {
+
+    enum NewEnum : int32_t {
+        ENUM_GOOD = Constants:CONST_BAR,
+        ENUM_BETTER = IExpression.Constants:CONST_BAR,
+        ENUM_BEST = android.hardware.tests.expression@1.0::IExpression.Constants:CONST_BAR,
+    };
+
+    typedef Color[((Constants:MAX_ARRAY_SIZE << 1) - (Constants:CONST_FOO + 1)*8) >> 1] SixteenColors;
+    struct ArrayOfColors {
+        Color[(Constants:MAX_ARRAY_SIZE << 1) - (Constants:CONST_FOO + 1)*8] my32Colors; // 32
+    };
+    struct AnotherArrayOfColors {
+        SixteenColors my16Colors;
+    };
+
+    foo3(int32_t[IExpression.Constants:MAX_ARRAY_SIZE] array);
+    foo2(SixteenColors array);
+    foo1(int32_t[Constants:CONST_FOO + 5] array);
+};