diff --git a/internal/integration/config.go b/internal/integration/config.go
index 5aea740752..96512b668d 100644
--- a/internal/integration/config.go
+++ b/internal/integration/config.go
@@ -26,23 +26,10 @@ var (
 )
 
 var (
-	tmpDir       string
 	loadedConfig Config
 )
 
-// TmpDir returns the absolute path to the projects's temp directory.
-func TmpDir() string {
-	return tmpDir
-}
-
 func init() {
-	cmd := exec.Command("git", "rev-parse", "--show-toplevel")
-	out, err := cmd.Output()
-	if err != nil {
-		panic(err)
-	}
-	tmpDir = filepath.Join(string(bytes.TrimSpace(out)), "tmp")
-
 	if err := yaml.Unmarshal(clientYAML, &loadedConfig); err != nil {
 		panic(err)
 	}
diff --git a/internal/integration/instance.go b/internal/integration/instance.go
index 6113bf0e37..2cff2e95e0 100644
--- a/internal/integration/instance.go
+++ b/internal/integration/instance.go
@@ -97,22 +97,6 @@ type Instance struct {
 	WebAuthN *webauthn.Client
 }
 
-// GetFirstInstance returns the default instance and org information,
-// with authorized machine users.
-// Using the first instance is not recommended as parallel test might
-// interfere with each other.
-// It is recommended to use [NewInstance] instead.
-func GetFirstInstance(ctx context.Context) *Instance {
-	i := &Instance{
-		Config: loadedConfig,
-		Domain: loadedConfig.Hostname,
-	}
-	token := loadInstanceOwnerPAT()
-	i.setClient(ctx)
-	i.setupInstance(ctx, token)
-	return i
-}
-
 // NewInstance returns a new instance that can be used for integration tests.
 // The instance contains a gRPC client connected to the domain of this instance.
 // The included users are the IAM_OWNER, ORG_OWNER of the default org and
@@ -206,14 +190,6 @@ func (i *Instance) Host() string {
 	return fmt.Sprintf("%s:%d", i.Domain, i.Config.Port)
 }
 
-func loadInstanceOwnerPAT() string {
-	data, err := os.ReadFile(filepath.Join(tmpDir, adminPATFile))
-	if err != nil {
-		panic(err)
-	}
-	return string(bytes.TrimSpace(data))
-}
-
 func (i *Instance) createMachineUserInstanceOwner(ctx context.Context, token string) {
 	mustAwait(func() error {
 		user, err := i.Client.Auth.GetMyUser(WithAuthorizationToken(ctx, token), &auth.GetMyUserRequest{})