diff --git a/test/env_unittest.cpp b/test/env_unittest.cpp
new file mode 100644
index 0000000..665f8a5
--- /dev/null
+++ b/test/env_unittest.cpp
@@ -0,0 +1,35 @@
+#include "env.hpp"
+#include "env_mock.hpp"
+#include "util.hpp"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+using ::testing::Return;
+using ::testing::StrEq;
+using ::testing::StrictMock;
+
+TEST(EnvTest, EmptyEnv)
+{
+    EXPECT_FALSE(
+        phosphor::utility::isAverageEnvSet(std::make_pair("power", "1")));
+}
+
+TEST(EnvTest, ValidAverageEnv)
+{
+    StrictMock<EnvMock> eMock;
+    envIntf = &eMock;
+
+    std::string power = "power";
+    std::string one = "1";
+    std::string two = "2";
+
+    EXPECT_CALL(eMock, getEnv(StrEq("AVERAGE"), power, one))
+        .WillOnce(Return("true"));
+    EXPECT_CALL(eMock, getEnv(StrEq("AVERAGE"), power, two))
+        .WillOnce(Return("bar"));
+
+    EXPECT_TRUE(phosphor::utility::isAverageEnvSet(std::make_pair(power, one)));
+    EXPECT_FALSE(
+        phosphor::utility::isAverageEnvSet(std::make_pair(power, two)));
+}