# isIsolateMode

Description: isIsolateMode cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/Environment/is-isolate-mode.mdx

### Signature

```solidity
function isIsolateMode() external view returns (bool result);
```

### Description

Returns whether the running Solidity test is executed in isolation mode, which you enable by setting `isolate` to `true` in the [Solidity tests configuration](/docs/reference/configuration#solidity-tests-configuration).

In isolation mode, every top-level call runs as a separate transaction, which changes gas accounting and when state is committed. Use this cheatcode to adapt a test, or to skip it, depending on the mode it runs in.

### Examples

```solidity
function testGasOfTransfer() public {
  if (!vm.isIsolateMode()) {
    vm.skip(true, "gas is only exact in isolation mode");
  }

  // ...
}
```

### SEE ALSO

- [Gas snapshots](/docs/reference/cheatcodes/environment/gas-snapshots)
- [skip](/docs/reference/cheatcodes/utilities/skip)