diff --git a/test/unittests/eof_test.cpp b/test/unittests/eof_test.cpp
index 673364318e..4451ce68b0 100644
--- a/test/unittests/eof_test.cpp
+++ b/test/unittests/eof_test.cpp
@@ -30,24 +30,27 @@ TEST(eof, read_valid_eof1_header)
     {
         std::string code;
         uint16_t types_size;
-        uint16_t code_size;
+        std::vector<uint16_t> code_sizes;
         uint16_t data_size;
     };
-    const TestCase test_cases[] = {
-        {"EF00 01 010004 0200010001 030000 00 00000000 00", 4, 1, 0},
-        {"EF00 01 010004 0200010006 030000 00 00000400 600160005500", 4, 6, 0},
-        {"EF00 01 010004 0200010001 030001 00 00000000 00 00 AA", 4, 1, 1},
-        {"EF00 01 010004 0200010006 030004 00 00000000 600160005500 AABBCCDD", 4, 6, 4},
-        {"EF00 01 010004 0200010100 031000 00 00000000" + std::string(256, '0') +
-                std::string(4096, 'F'),
-            4, 256, 4096},
-    };
+    std::string nops_255;
+    for (int i = 0; i < 255; ++i)
+        nops_255 += "5B";
+
+    const TestCase test_cases[] = {{"EF00 01 010004 0200010001 030000 00 00000000 00", 4, {1}, 0},
+        {"EF00 01 010004 0200010006 030000 00 00000002 600160005500", 4, {6}, 0},
+        {"EF00 01 010004 0200010001 030001 00 00000000 00 AA", 4, {1}, 1},
+        {"EF00 01 010004 0200010006 030004 00 00000002 600160005500 AABBCCDD", 4, {6}, 4},
+        {"EF00 01 010004 0200010100 031000 00 00000000" + nops_255 + "00" + std::string(8192, 'F'),
+            4, {256}, 4096}};
 
     for (const auto& test_case : test_cases)
     {
         const auto code = from_spaced_hex(test_case.code).value();
+        EXPECT_EQ(validate_eof(EVMC_CANCUN, code), EOFValidationError::success) << test_case.code;
+
         const auto header = read_valid_eof1_header(code);
-        EXPECT_EQ(header.code_sizes[0], test_case.code_size) << test_case.code;
+        EXPECT_EQ(header.code_sizes, test_case.code_sizes) << test_case.code;
         EXPECT_EQ(header.data_size, test_case.data_size) << test_case.code;
         EXPECT_EQ(header.types.size() * 4, test_case.types_size) << test_case.code;
     }