diff --git a/crates/revmc/src/tests/mod.rs b/crates/revmc/src/tests/mod.rs
index 5fc4616e..a646719a 100644
--- a/crates/revmc/src/tests/mod.rs
+++ b/crates/revmc/src/tests/mod.rs
@@ -138,6 +138,12 @@ tests! {
             expected_stack: &[U256::ZERO, U256::ZERO],
             expected_gas: 2 + 2,
         }),
+        eof_in_legacy_returncontract(@raw {
+            bytecode: &[op::PUSH0, op::PUSH0, op::RETURNCONTRACT, 0],
+            expected_return: InstructionResult::ReturnContractInNotInitEOF,
+            expected_stack: &[U256::ZERO, U256::ZERO],
+            expected_gas: 2 + 2,
+        }),
     }
 
     stack {
@@ -832,6 +838,12 @@ tests! {
             expected_stack: &[U256::from(u64::MAX - 33)],
             expected_gas: 3 + 3,
         }),
+        mload_overflow6(@raw {
+            bytecode: &[op::ADDRESS, op::MLOAD],
+            expected_return: InstructionResult::InvalidOperandOOG,
+            expected_stack: &[DEF_ADDR.into_word().into()],
+            expected_gas: 5,
+        }),
         mstore1(@raw {
             bytecode: &[op::PUSH0, op::PUSH0, op::MSTORE],
             expected_memory: &[0; 32],
diff --git a/crates/revmc/src/tests/runner.rs b/crates/revmc/src/tests/runner.rs
index d0ffdc59..71088728 100644
--- a/crates/revmc/src/tests/runner.rs
+++ b/crates/revmc/src/tests/runner.rs
@@ -49,11 +49,6 @@ impl<'a> arbitrary::Arbitrary<'a> for TestCase<'a> {
     }
 }
 
-#[cfg(feature = "__fuzzing")]
-fn arbitrary_spec_id(u: &mut arbitrary::Unstructured<'_>) -> arbitrary::Result<SpecId> {
-    Ok(SpecId::try_from_u8(u.arbitrary::<u8>()? % 32).unwrap_or(DEF_SPEC))
-}
-
 impl Default for TestCase<'_> {
     fn default() -> Self {
         Self {