diff --git a/runner/manager.go b/runner/manager.go
index 7e37096..51890e7 100644
--- a/runner/manager.go
+++ b/runner/manager.go
@@ -56,9 +56,6 @@ type Manager interface {
 	// The runner is deleted or cleaned up for reuse depending on the used executor.
 	Return(r Runner) error
 
-	// ScaleAllEnvironments checks for all environments if enough runners are created.
-	ScaleAllEnvironments() error
-
 	// Load fetches all already created runners from the executor and registers them.
 	// It should be called during the startup process (e.g. on creation of the Manager).
 	Load()
@@ -213,16 +210,6 @@ func (m *NomadRunnerManager) Return(r Runner) (err error) {
 	return
 }
 
-func (m *NomadRunnerManager) ScaleAllEnvironments() error {
-	for _, environment := range m.environments.List() {
-		err := m.scaleEnvironment(environment.ID())
-		if err != nil {
-			return fmt.Errorf("can not scale up: %w", err)
-		}
-	}
-	return nil
-}
-
 func (m *NomadRunnerManager) Load() {
 	for _, environment := range m.environments.List() {
 		environmentLogger := log.WithField("environmentID", environment.ID())
diff --git a/runner/manager_mock.go b/runner/manager_mock.go
index 6483ed1..142243c 100644
--- a/runner/manager_mock.go
+++ b/runner/manager_mock.go
@@ -97,17 +97,3 @@ func (_m *ManagerMock) Return(r Runner) error {
 
 	return r0
 }
-
-// ScaleAllEnvironments provides a mock function with given fields:
-func (_m *ManagerMock) ScaleAllEnvironments() error {
-	ret := _m.Called()
-
-	var r0 error
-	if rf, ok := ret.Get(0).(func() error); ok {
-		r0 = rf()
-	} else {
-		r0 = ret.Error(0)
-	}
-
-	return r0
-}