diff --git a/crates/evm/src/instructions/memory_operations.cairo b/crates/evm/src/instructions/memory_operations.cairo
index cf625ece7..47401703a 100644
--- a/crates/evm/src/instructions/memory_operations.cairo
+++ b/crates/evm/src/instructions/memory_operations.cairo
@@ -14,7 +14,7 @@ impl MemoryOperation of MemoryOperationTrait {
     /// MLOAD operation.
     /// Load word from memory and push to stack.
     fn exec_mload(ref self: ExecutionContext) -> Result<(), EVMError> {
-        Result::Ok(())
+        panic_with_felt252('MLOAD not implement yet')
     }
 
     /// 0x52 - MSTORE operation.
diff --git a/crates/evm/src/tests/test_instructions/test_memory_operations.cairo b/crates/evm/src/tests/test_instructions/test_memory_operations.cairo
index 0890335d5..801bf6156 100644
--- a/crates/evm/src/tests/test_instructions/test_memory_operations.cairo
+++ b/crates/evm/src/tests/test_instructions/test_memory_operations.cairo
@@ -44,6 +44,44 @@ fn test_pc_gets_updated_properly_1() {
     assert(ctx.stack.pop().unwrap() == 9000, 'updating PC failed');
 }
 
+// 0x51 - MLOAD
+
+#[test]
+#[available_gas(20000000000)]
+#[should_panic(expected: ('MLOAD not implement yet',))]
+fn test_exec_mload_should_load_a_value_from_memory() {
+    assert_mload(0x1, 0, 0x1, 32);
+}
+
+#[test]
+#[available_gas(20000000000)]
+#[should_panic(expected: ('MLOAD not implement yet',))]
+fn test_exec_mload_should_load_a_value_from_memory_with_memory_expansion() {
+    assert_mload(0x1, 16, 0x100000000000000000000000000000000, 64);
+}
+
+#[test]
+#[available_gas(20000000000)]
+#[should_panic(expected: ('MLOAD not implement yet',))]
+fn test_exec_mload_should_load_a_value_from_memory_with_offset_larger_than_msize() {
+    assert_mload(0x1, 684, 0x0, 736);
+}
+
+fn assert_mload(value: u256, offset: u256, expected_value: u256, expected_memory_size: u32) {
+    // Given
+    let mut ctx = setup_execution_context();
+    ctx.memory.store(value, 0);
+
+    ctx.stack.push(offset);
+
+    // When
+    ctx.exec_mload();
+
+    // Then
+    assert(ctx.stack.len() == 1, 'stack should have one element');
+    assert(ctx.stack.pop().unwrap() == expected_value, 'mload failed');
+    assert(ctx.memory.bytes_len == expected_memory_size, 'memory size error');
+}
 
 #[test]
 #[available_gas(20000000)]