then:
        System.getenv("TEST_ENV_1") == "value"
        System.getenv("TEST_ENV_2") == "value"

        when:
        env.removeEnvironmentVariable("TEST_ENV_1")
        env.maybeRemoveEnvironmentVariable("TEST_ENV_2")

        then:
        System.getenv("TEST_ENV_1") == null
        System.getenv("TEST_ENV_2") == null
    }

    @Requires(UnitTestPreconditions.WorkingDir)

    @Override
    public void removeEnvironmentVariable(String name) throws NativeIntegrationException {
        throw notSupported();
    }

    @Override
    public EnvironmentModificationResult maybeRemoveEnvironmentVariable(String name) {
        return EnvironmentModificationResult.UNSUPPORTED_ENVIRONMENT;
    }

    @Override
    public void setEnvironmentVariable(String name, String value) throws NativeIntegrationException {

        reflectiveEnvironment.unsetenv(name);
    }

    protected abstract void removeNativeEnvironmentVariable(String name);

    @Override
    public EnvironmentModificationResult maybeRemoveEnvironmentVariable(String name) {
        removeEnvironmentVariable(name);
        return EnvironmentModificationResult.SUCCESS;
    }

    @Override

     *
     * @param name The name of the environment variable.
     * @return true if removed, false if not possible.
     */
    EnvironmentModificationResult maybeRemoveEnvironmentVariable(String name);

    /**
     * Sets the given environment variable.
     *
     * @param name The name
     * @param value The value. Can be null, which removes the environment variable.

                if (oldValue != null) {
                    processEnvironment.maybeSetEnvironmentVariable(envVar, oldValue);
                } else {
                    processEnvironment.maybeRemoveEnvironmentVariable(envVar);
                }
            }
            System.setProperty("user.dir", originalSysProperties.getProperty("user.dir"));
            System.setIn(originalStdIn);
        }
    }