runtime: working-group: Fix tests.

runtime-modules/working-group/src/tests/mod.rs

@@ -115,14 +115,17 @@ fn add_opening_fails_with_zero_reward() {
 fn add_opening_fails_with_insufficient_balance() {
     build_test_externalities().execute_with(|| {
         HireLeadFixture::default()
-            .with_initial_balance(<Test as Trait>::MinimumApplicationStake::get() + 1)
+            .with_initial_balance(<Test as Trait>::MinimumApplicationStake::get())
             .hire_lead();
 
-        let add_opening_fixture = AddOpeningFixture::default();
+        let add_opening_fixture = AddOpeningFixture::default().with_stake_policy(StakePolicy {
+            stake_amount: <Test as Trait>::MinimumApplicationStake::get() + 1,
+            leaving_unstaking_period: <Test as Trait>::MinUnstakingPeriodLimit::get() + 1,
+        });
 
-        add_opening_fixture.call_and_assert(Err(
-            Error::<Test, DefaultInstance>::InsufficientBalanceToCoverStake.into(),
-        ));
+        add_opening_fixture.call_and_assert(Err(DispatchError::Other(
+            "Not enough balance for a new stake.",
+        )));
     });
 }