diff --git a/x/emissions/migrations/v3/migrate_test.go b/x/emissions/migrations/v3/migrate_test.go
index c36bf3b77d..fabdb05f2a 100644
--- a/x/emissions/migrations/v3/migrate_test.go
+++ b/x/emissions/migrations/v3/migrate_test.go
@@ -47,6 +47,7 @@ func TestMigrate(t *testing.T) {
 		params, found := k.GetParams(ctx)
 		require.True(t, found)
 		legacyParams.ObserverSlashAmount = sdkmath.NewInt(100000000000000000)
+		legacyParams.BallotMaturityBlocks = 100
 		require.Equal(t, legacyParams, params)
 	})
 
diff --git a/x/observer/keeper/migrator.go b/x/observer/keeper/migrator.go
index 0c3d85613b..13ce8b52a8 100644
--- a/x/observer/keeper/migrator.go
+++ b/x/observer/keeper/migrator.go
@@ -17,28 +17,28 @@ func NewMigrator(keeper Keeper) Migrator {
 }
 
 // Migrate1to2 migrates the store from consensus version 1 to 2
-func (m Migrator) Migrate1to2(ctx sdk.Context) error {
+func (m Migrator) Migrate1to2(_ sdk.Context) error {
 	return nil
 }
 
 // Migrate2to3 migrates the store from consensus version 2 to 3
-func (m Migrator) Migrate2to3(ctx sdk.Context) error {
+func (m Migrator) Migrate2to3(_ sdk.Context) error {
 	return nil
 }
 
-func (m Migrator) Migrate3to4(ctx sdk.Context) error {
+func (m Migrator) Migrate3to4(_ sdk.Context) error {
 	return nil
 }
 
-func (m Migrator) Migrate4to5(ctx sdk.Context) error {
+func (m Migrator) Migrate4to5(_ sdk.Context) error {
 	return nil
 }
 
-func (m Migrator) Migrate5to6(ctx sdk.Context) error {
+func (m Migrator) Migrate5to6(_ sdk.Context) error {
 	return nil
 }
 
 // Migrate6to7 migrates the store from consensus version 6 to 7
-func (m Migrator) Migrate6to7(ctx sdk.Context) error {
+func (m Migrator) Migrate6to7(_ sdk.Context) error {
 	return nil
 }