diff --git a/test/unittests/instructions_test.cpp b/test/unittests/instructions_test.cpp
index a4216be4c..d665c4872 100644
--- a/test/unittests/instructions_test.cpp
+++ b/test/unittests/instructions_test.cpp
@@ -382,6 +382,10 @@ TEST(instructions, shanghai_hard_fork)
     {
         if (op == OP_PUSH0)
             continue;
+        if (op == OP_DUPN)
+            continue;
+        if (op == OP_SWAPN)
+            continue;
         EXPECT_EQ(s[op], p[op]) << op;
         EXPECT_STREQ(sn[op], pn[op]) << op;
     }
@@ -393,4 +397,20 @@ TEST(instructions, shanghai_hard_fork)
     EXPECT_EQ(p[OP_PUSH0].gas_cost, 0);
     EXPECT_EQ(sn[OP_PUSH0], std::string{"PUSH0"});
     EXPECT_TRUE(pn[OP_PUSH0] == nullptr);
+
+    // EIP-663: DUPN instruction
+    EXPECT_EQ(s[OP_DUPN].gas_cost, 3);
+    EXPECT_EQ(s[OP_DUPN].stack_height_required, 0);
+    EXPECT_EQ(s[OP_DUPN].stack_height_change, 1);
+    EXPECT_EQ(p[OP_DUPN].gas_cost, 0);
+    EXPECT_EQ(sn[OP_DUPN], std::string{"DUPN"});
+    EXPECT_TRUE(pn[OP_DUPN] == nullptr);
+
+    // EIP-663: SWAPN instruction
+    EXPECT_EQ(s[OP_SWAPN].gas_cost, 3);
+    EXPECT_EQ(s[OP_SWAPN].stack_height_required, 0);
+    EXPECT_EQ(s[OP_SWAPN].stack_height_change, 0);
+    EXPECT_EQ(p[OP_SWAPN].gas_cost, 0);
+    EXPECT_EQ(sn[OP_SWAPN], std::string{"SWAPN"});
+    EXPECT_TRUE(pn[OP_SWAPN] == nullptr);
 }