diff --git a/test/unittests/test_instructions.cpp b/test/unittests/test_instructions.cpp
index b9e3c3c..0f6858d 100644
--- a/test/unittests/test_instructions.cpp
+++ b/test/unittests/test_instructions.cpp
@@ -3,3 +3,35 @@
 // Licensed under the MIT License. See the LICENSE file.
 
 #include <evmc/instructions.h>
+
+#include <gtest/gtest.h>
+
+TEST(instructions, tangerine_whistle_hard_fork)
+{
+    const auto h = evmc_get_instruction_metrics_table(EVMC_HOMESTEAD);
+    const auto tw = evmc_get_instruction_metrics_table(EVMC_TANGERINE_WHISTLE);
+
+    EXPECT_EQ(h[EXTCODESIZE].gas_cost, 20);
+    EXPECT_EQ(tw[EXTCODESIZE].gas_cost, 700);
+
+    EXPECT_EQ(h[EXTCODECOPY].gas_cost, 20);
+    EXPECT_EQ(tw[EXTCODECOPY].gas_cost, 700);
+
+    EXPECT_EQ(h[BALANCE].gas_cost, 20);
+    EXPECT_EQ(tw[BALANCE].gas_cost, 400);
+
+    EXPECT_EQ(h[SLOAD].gas_cost, 50);
+    EXPECT_EQ(tw[SLOAD].gas_cost, 200);
+
+    EXPECT_EQ(h[CALL].gas_cost, 40);
+    EXPECT_EQ(tw[CALL].gas_cost, 700);
+
+    EXPECT_EQ(h[CALLCODE].gas_cost, 40);
+    EXPECT_EQ(tw[CALLCODE].gas_cost, 700);
+
+    EXPECT_EQ(h[DELEGATECALL].gas_cost, 40);
+    EXPECT_EQ(tw[DELEGATECALL].gas_cost, 700);
+
+    EXPECT_EQ(h[SELFDESTRUCT].gas_cost, 0);
+    EXPECT_EQ(tw[SELFDESTRUCT].gas_cost, 5000);
+}
\ No newline at end of file