diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 5f925a2..17a9dcb 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: bufbuild/buf-setup-action@v0.7.0
+      - uses: bufbuild/buf-setup-action@v1.7.0
       - uses: bufbuild/buf-lint-action@v1
         with:
           input: "proto"
diff --git a/.github/workflows/test-integration.yml b/.github/workflows/test-integration.yml
index 70b36b1..de896cb 100644
--- a/.github/workflows/test-integration.yml
+++ b/.github/workflows/test-integration.yml
@@ -11,6 +11,11 @@ jobs:
         with:
           fetch-depth: 2
 
+      - name: Set Swap Space
+        uses: pierotofy/set-swap-space@master
+        with:
+          swap-size-gb: 10
+
       - name: Get changed files
         id: changed-files
         uses: tj-actions/changed-files@v14.1
@@ -25,11 +30,29 @@ jobs:
       - uses: cachix/install-nix-action@v16
         if: steps.changed-files.outputs.any_changed == 'true'
 
-      - name: Run Integration tests
+      - name: Run CLI integration tests
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: nick-fields/retry@v2
         with:
           timeout_minutes: 240
           max_attempts: 5
           retry_on: error
-          command: nix develop --command -- make test_integration
+          command: nix develop --command -- make test_integration_cli
+
+      - name: Run Embedded DERP server integration tests
+        if: steps.changed-files.outputs.any_changed == 'true'
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 240
+          max_attempts: 5
+          retry_on: error
+          command: nix develop --command -- make test_integration_derp
+
+      - name: Run general integration tests
+        if: steps.changed-files.outputs.any_changed == 'true'
+        uses: nick-fields/retry@v2
+        with:
+          timeout_minutes: 240
+          max_attempts: 5
+          retry_on: error
+          command: nix develop --command -- make test_integration_general
diff --git a/Makefile b/Makefile
index 404c3c0..651ff5c 100644
--- a/Makefile
+++ b/Makefile
@@ -24,14 +24,16 @@ dev: lint test build
 test:
 	@go test -coverprofile=coverage.out ./...
 
-test_integration:
-	go test -failfast -tags integration -timeout 30m -count=1 ./...
+test_integration: test_integration_cli test_integration_derp test_integration_general
 
 test_integration_cli:
-	go test -tags integration -v integration_cli_test.go integration_common_test.go
+	go test -failfast -tags integration_cli,integration -timeout 30m -count=1 ./...
 
 test_integration_derp:
-	go test -tags integration -v integration_embedded_derp_test.go integration_common_test.go
+	go test -failfast -tags integration_derp,integration -timeout 30m -count=1 ./...
+
+test_integration_general:
+	go test -failfast -tags integration_general,integration -timeout 30m -count=1 ./...
 
 coverprofile_func:
 	go tool cover -func=coverage.out
diff --git a/api_key.go b/api_key.go
index c1bbce2..01291d7 100644
--- a/api_key.go
+++ b/api_key.go
@@ -14,7 +14,7 @@ const (
 	apiPrefixLength = 7
 	apiKeyLength    = 32
 
-	errAPIKeyFailedToParse = Error("Failed to parse ApiKey")
+	ErrAPIKeyFailedToParse = Error("Failed to parse ApiKey")
 )
 
 // APIKey describes the datamodel for API keys used to remotely authenticate with
@@ -116,7 +116,7 @@ func (h *Headscale) ExpireAPIKey(key *APIKey) error {
 func (h *Headscale) ValidateAPIKey(keyStr string) (bool, error) {
 	prefix, hash, found := strings.Cut(keyStr, ".")
 	if !found {
-		return false, errAPIKeyFailedToParse
+		return false, ErrAPIKeyFailedToParse
 	}
 
 	key, err := h.GetAPIKey(prefix)
diff --git a/db.go b/db.go
index 5df9c23..f0a0a59 100644
--- a/db.go
+++ b/db.go
@@ -248,7 +248,7 @@ func (hi *HostInfo) Scan(destination interface{}) error {
 		return json.Unmarshal([]byte(value), hi)
 
 	default:
-		return fmt.Errorf("%w: unexpected data type %T", errMachineAddressesInvalid, destination)
+		return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
 	}
 }
 
@@ -270,7 +270,7 @@ func (i *IPPrefixes) Scan(destination interface{}) error {
 		return json.Unmarshal([]byte(value), i)
 
 	default:
-		return fmt.Errorf("%w: unexpected data type %T", errMachineAddressesInvalid, destination)
+		return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
 	}
 }
 
@@ -292,7 +292,7 @@ func (i *StringList) Scan(destination interface{}) error {
 		return json.Unmarshal([]byte(value), i)
 
 	default:
-		return fmt.Errorf("%w: unexpected data type %T", errMachineAddressesInvalid, destination)
+		return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
 	}
 }
 
diff --git a/integration_cli_test.go b/integration_cli_test.go
index 2f58e71..bc7d1c1 100644
--- a/integration_cli_test.go
+++ b/integration_cli_test.go
@@ -1,5 +1,4 @@
-//go:build integration
-// +build integration
+//go:build integration_cli
 
 package headscale
 
@@ -73,21 +72,22 @@ func (s *IntegrationCLITestSuite) SetupTest() {
 		s.FailNow(fmt.Sprintf("Could not remove existing container before building test: %s", err), "")
 	}
 
-	fmt.Println("Creating headscale container")
+	fmt.Println("Creating headscale container for CLI tests")
 	if pheadscale, err := s.pool.BuildAndRunWithBuildOptions(headscaleBuildOptions, headscaleOptions, DockerRestartPolicy); err == nil {
 		s.headscale = *pheadscale
 	} else {
 		s.FailNow(fmt.Sprintf("Could not start headscale container: %s", err), "")
 	}
-	fmt.Println("Created headscale container")
+	fmt.Println("Created headscale container for CLI tests")
 
-	fmt.Println("Waiting for headscale to be ready")
+	fmt.Println("Waiting for headscale to be ready for CLI tests")
 	hostEndpoint := fmt.Sprintf("localhost:%s", s.headscale.GetPort("8080/tcp"))
 
 	if err := s.pool.Retry(func() error {
 		url := fmt.Sprintf("http://%s/health", hostEndpoint)
 		resp, err := http.Get(url)
 		if err != nil {
+			fmt.Printf("headscale for CLI test is not ready: %s\n", err)
 			return err
 		}
 		if resp.StatusCode != http.StatusOK {
@@ -102,7 +102,7 @@ func (s *IntegrationCLITestSuite) SetupTest() {
 		// https://github.com/stretchr/testify/issues/849
 		return // fmt.Errorf("Could not connect to headscale: %s", err)
 	}
-	fmt.Println("headscale container is ready")
+	fmt.Println("headscale container is ready for CLI tests")
 }
 
 func (s *IntegrationCLITestSuite) TearDownTest() {
diff --git a/integration_common_test.go b/integration_common_test.go
index 4ee2d3b..b0c3dbb 100644
--- a/integration_common_test.go
+++ b/integration_common_test.go
@@ -1,5 +1,4 @@
 //go:build integration
-// +build integration
 
 package headscale
 
@@ -20,6 +19,7 @@ import (
 )
 
 const (
+	headscaleHostname      = "headscale-derp"
 	DOCKER_EXECUTE_TIMEOUT = 10 * time.Second
 )
 
@@ -30,9 +30,10 @@ var (
 	IpPrefix6 = netaddr.MustParseIPPrefix("fd7a:115c:a1e0::/48")
 
 	tailscaleVersions = []string{
-		"head",
-		"unstable",
-		"1.26.0",
+		// "head",
+		// "unstable",
+		"1.28.0",
+		"1.26.2",
 		"1.24.2",
 		"1.22.2",
 		"1.20.4",
diff --git a/integration_embedded_derp_test.go b/integration_embedded_derp_test.go
index ecca8ba..da323d8 100644
--- a/integration_embedded_derp_test.go
+++ b/integration_embedded_derp_test.go
@@ -1,4 +1,4 @@
-//go:build integration
+//go:build integration_derp
 
 package headscale
 
@@ -28,9 +28,8 @@ import (
 )
 
 const (
-	headscaleHostname = "headscale-derp"
-	namespaceName     = "derpnamespace"
-	totalContainers   = 3
+	namespaceName   = "derpnamespace"
+	totalContainers = 3
 )
 
 type IntegrationDERPTestSuite struct {
@@ -134,15 +133,15 @@ func (s *IntegrationDERPTestSuite) SetupSuite() {
 		s.FailNow(fmt.Sprintf("Could not remove existing container before building test: %s", err), "")
 	}
 
-	log.Println("Creating headscale container")
+	log.Println("Creating headscale container for DERP integration tests")
 	if pheadscale, err := s.pool.BuildAndRunWithBuildOptions(headscaleBuildOptions, headscaleOptions, DockerRestartPolicy); err == nil {
 		s.headscale = *pheadscale
 	} else {
 		s.FailNow(fmt.Sprintf("Could not start headscale container: %s", err), "")
 	}
-	log.Println("Created headscale container to test DERP")
+	log.Println("Created headscale container for embedded DERP tests")
 
-	log.Println("Creating tailscale containers")
+	log.Println("Creating tailscale containers for embedded DERP tests")
 
 	for i := 0; i < totalContainers; i++ {
 		version := tailscaleVersions[i%len(tailscaleVersions)]
@@ -154,7 +153,7 @@ func (s *IntegrationDERPTestSuite) SetupSuite() {
 		s.tailscales[hostname] = *container
 	}
 
-	log.Println("Waiting for headscale to be ready")
+	log.Println("Waiting for headscale to be ready for embedded DERP tests")
 	hostEndpoint := fmt.Sprintf("localhost:%s", s.headscale.GetPort("8443/tcp"))
 
 	if err := s.pool.Retry(func() error {
@@ -164,6 +163,7 @@ func (s *IntegrationDERPTestSuite) SetupSuite() {
 		client := &http.Client{Transport: insecureTransport}
 		resp, err := client.Get(url)
 		if err != nil {
+			fmt.Printf("headscale for embedded DERP tests is not ready: %s\n", err)
 			return err
 		}
 
@@ -179,7 +179,7 @@ func (s *IntegrationDERPTestSuite) SetupSuite() {
 		// https://github.com/stretchr/testify/issues/849
 		return // fmt.Errorf("Could not connect to headscale: %s", err)
 	}
-	log.Println("headscale container is ready")
+	log.Println("headscale container is ready for embedded DERP tests")
 
 	log.Printf("Creating headscale namespace: %s\n", namespaceName)
 	result, err := ExecuteCommand(
diff --git a/integration_test.go b/integration_general_test.go
similarity index 96%
rename from integration_test.go
rename to integration_general_test.go
index 2214b89..4bbdf27 100644
--- a/integration_test.go
+++ b/integration_general_test.go
@@ -1,5 +1,4 @@
-//go:build integration
-// +build integration
+//go:build integration_general
 
 package headscale
 
@@ -251,15 +250,15 @@ func (s *IntegrationTestSuite) SetupSuite() {
 		s.FailNow(fmt.Sprintf("Could not remove existing container before building test: %s", err), "")
 	}
 
-	log.Println("Creating headscale container")
+	log.Println("Creating headscale container for core integration tests")
 	if pheadscale, err := s.pool.BuildAndRunWithBuildOptions(headscaleBuildOptions, headscaleOptions, DockerRestartPolicy); err == nil {
 		s.headscale = *pheadscale
 	} else {
-		s.FailNow(fmt.Sprintf("Could not start headscale container: %s", err), "")
+		s.FailNow(fmt.Sprintf("Could not start headscale container for core integration tests: %s", err), "")
 	}
-	log.Println("Created headscale container")
+	log.Println("Created headscale container for core integration tests")
 
-	log.Println("Creating tailscale containers")
+	log.Println("Creating tailscale containers for core integration tests")
 	for namespace, scales := range s.namespaces {
 		for i := 0; i < scales.count; i++ {
 			version := tailscaleVersions[i%len(tailscaleVersions)]
@@ -273,7 +272,7 @@ func (s *IntegrationTestSuite) SetupSuite() {
 		}
 	}
 
-	log.Println("Waiting for headscale to be ready")
+	log.Println("Waiting for headscale to be ready for core integration tests")
 	hostEndpoint := fmt.Sprintf("localhost:%s", s.headscale.GetPort("8080/tcp"))
 
 	if err := s.pool.Retry(func() error {
@@ -281,6 +280,7 @@ func (s *IntegrationTestSuite) SetupSuite() {
 
 		resp, err := http.Get(url)
 		if err != nil {
+			fmt.Printf("headscale for core integration test is not ready: %s\n", err)
 			return err
 		}
 
@@ -296,7 +296,7 @@ func (s *IntegrationTestSuite) SetupSuite() {
 		// https://github.com/stretchr/testify/issues/849
 		return // fmt.Errorf("Could not connect to headscale: %s", err)
 	}
-	log.Println("headscale container is ready")
+	log.Println("headscale container is ready for core integration tests")
 
 	for namespace, scales := range s.namespaces {
 		log.Printf("Creating headscale namespace: %s\n", namespace)
diff --git a/machine.go b/machine.go
index dda4902..22be0da 100644
--- a/machine.go
+++ b/machine.go
@@ -18,14 +18,14 @@ import (
 )
 
 const (
-	errMachineNotFound                  = Error("machine not found")
-	errMachineRouteIsNotAvailable       = Error("route is not available on machine")
-	errMachineAddressesInvalid          = Error("failed to parse machine addresses")
-	errMachineNotFoundRegistrationCache = Error(
+	ErrMachineNotFound                  = Error("machine not found")
+	ErrMachineRouteIsNotAvailable       = Error("route is not available on machine")
+	ErrMachineAddressesInvalid          = Error("failed to parse machine addresses")
+	ErrMachineNotFoundRegistrationCache = Error(
 		"machine not found in registration cache",
 	)
-	errCouldNotConvertMachineInterface = Error("failed to convert machine interface")
-	errHostnameTooLong                 = Error("Hostname too long")
+	ErrCouldNotConvertMachineInterface = Error("failed to convert machine interface")
+	ErrHostnameTooLong                 = Error("Hostname too long")
 	MachineGivenNameHashLength         = 8
 	MachineGivenNameTrimSize           = 2
 )
@@ -112,7 +112,7 @@ func (ma *MachineAddresses) Scan(destination interface{}) error {
 		return nil
 
 	default:
-		return fmt.Errorf("%w: unexpected data type %T", errMachineAddressesInvalid, destination)
+		return fmt.Errorf("%w: unexpected data type %T", ErrMachineAddressesInvalid, destination)
 	}
 }
 
@@ -337,7 +337,7 @@ func (h *Headscale) GetMachine(namespace string, name string) (*Machine, error)
 		}
 	}
 
-	return nil, errMachineNotFound
+	return nil, ErrMachineNotFound
 }
 
 // GetMachineByID finds a Machine by ID and returns the Machine struct.
@@ -635,7 +635,7 @@ func (machine Machine) toNode(
 			return nil, fmt.Errorf(
 				"hostname %q is too long it cannot except 255 ASCII chars: %w",
 				hostname,
-				errHostnameTooLong,
+				ErrHostnameTooLong,
 			)
 		}
 	} else {
@@ -785,11 +785,11 @@ func (h *Headscale) RegisterMachineFromAuthCallback(
 
 			return machine, err
 		} else {
-			return nil, errCouldNotConvertMachineInterface
+			return nil, ErrCouldNotConvertMachineInterface
 		}
 	}
 
-	return nil, errMachineNotFoundRegistrationCache
+	return nil, ErrMachineNotFoundRegistrationCache
 }
 
 // RegisterMachine is executed from the CLI to register a new Machine using its MachineKey.
@@ -877,7 +877,7 @@ func (h *Headscale) EnableRoutes(machine *Machine, routeStrs ...string) error {
 			return fmt.Errorf(
 				"route (%s) is not available on node %s: %w",
 				machine.Hostname,
-				newRoute, errMachineRouteIsNotAvailable,
+				newRoute, ErrMachineRouteIsNotAvailable,
 			)
 		}
 	}
diff --git a/namespaces.go b/namespaces.go
index 0add03f..ac8913f 100644
--- a/namespaces.go
+++ b/namespaces.go
@@ -16,10 +16,10 @@ import (
 )
 
 const (
-	errNamespaceExists          = Error("Namespace already exists")
-	errNamespaceNotFound        = Error("Namespace not found")
-	errNamespaceNotEmptyOfNodes = Error("Namespace not empty: node(s) found")
-	errInvalidNamespaceName     = Error("Invalid namespace name")
+	ErrNamespaceExists          = Error("Namespace already exists")
+	ErrNamespaceNotFound        = Error("Namespace not found")
+	ErrNamespaceNotEmptyOfNodes = Error("Namespace not empty: node(s) found")
+	ErrInvalidNamespaceName     = Error("Invalid namespace name")
 )
 
 const (
@@ -47,7 +47,7 @@ func (h *Headscale) CreateNamespace(name string) (*Namespace, error) {
 	}
 	namespace := Namespace{}
 	if err := h.db.Where("name = ?", name).First(&namespace).Error; err == nil {
-		return nil, errNamespaceExists
+		return nil, ErrNamespaceExists
 	}
 	namespace.Name = name
 	if err := h.db.Create(&namespace).Error; err != nil {
@@ -67,7 +67,7 @@ func (h *Headscale) CreateNamespace(name string) (*Namespace, error) {
 func (h *Headscale) DestroyNamespace(name string) error {
 	namespace, err := h.GetNamespace(name)
 	if err != nil {
-		return errNamespaceNotFound
+		return ErrNamespaceNotFound
 	}
 
 	machines, err := h.ListMachinesInNamespace(name)
@@ -75,7 +75,7 @@ func (h *Headscale) DestroyNamespace(name string) error {
 		return err
 	}
 	if len(machines) > 0 {
-		return errNamespaceNotEmptyOfNodes
+		return ErrNamespaceNotEmptyOfNodes
 	}
 
 	keys, err := h.ListPreAuthKeys(name)
@@ -110,9 +110,9 @@ func (h *Headscale) RenameNamespace(oldName, newName string) error {
 	}
 	_, err = h.GetNamespace(newName)
 	if err == nil {
-		return errNamespaceExists
+		return ErrNamespaceExists
 	}
-	if !errors.Is(err, errNamespaceNotFound) {
+	if !errors.Is(err, ErrNamespaceNotFound) {
 		return err
 	}
 
@@ -132,7 +132,7 @@ func (h *Headscale) GetNamespace(name string) (*Namespace, error) {
 		result.Error,
 		gorm.ErrRecordNotFound,
 	) {
-		return nil, errNamespaceNotFound
+		return nil, ErrNamespaceNotFound
 	}
 
 	return &namespace, nil
@@ -272,7 +272,7 @@ func NormalizeToFQDNRules(name string, stripEmailDomain bool) (string, error) {
 			return "", fmt.Errorf(
 				"label %v is more than 63 chars: %w",
 				elt,
-				errInvalidNamespaceName,
+				ErrInvalidNamespaceName,
 			)
 		}
 	}
@@ -285,21 +285,21 @@ func CheckForFQDNRules(name string) error {
 		return fmt.Errorf(
 			"DNS segment must not be over 63 chars. %v doesn't comply with this rule: %w",
 			name,
-			errInvalidNamespaceName,
+			ErrInvalidNamespaceName,
 		)
 	}
 	if strings.ToLower(name) != name {
 		return fmt.Errorf(
 			"DNS segment should be lowercase. %v doesn't comply with this rule: %w",
 			name,
-			errInvalidNamespaceName,
+			ErrInvalidNamespaceName,
 		)
 	}
 	if invalidCharsInNamespaceRegex.MatchString(name) {
 		return fmt.Errorf(
 			"DNS segment should only be composed of lowercase ASCII letters numbers, hyphen and dots. %v doesn't comply with theses rules: %w",
 			name,
-			errInvalidNamespaceName,
+			ErrInvalidNamespaceName,
 		)
 	}
 
diff --git a/namespaces_test.go b/namespaces_test.go
index f8afa15..6f33585 100644
--- a/namespaces_test.go
+++ b/namespaces_test.go
@@ -26,7 +26,7 @@ func (s *Suite) TestCreateAndDestroyNamespace(c *check.C) {
 
 func (s *Suite) TestDestroyNamespaceErrors(c *check.C) {
 	err := app.DestroyNamespace("test")
-	c.Assert(err, check.Equals, errNamespaceNotFound)
+	c.Assert(err, check.Equals, ErrNamespaceNotFound)
 
 	namespace, err := app.CreateNamespace("test")
 	c.Assert(err, check.IsNil)
@@ -60,7 +60,7 @@ func (s *Suite) TestDestroyNamespaceErrors(c *check.C) {
 	app.db.Save(&machine)
 
 	err = app.DestroyNamespace("test")
-	c.Assert(err, check.Equals, errNamespaceNotEmptyOfNodes)
+	c.Assert(err, check.Equals, ErrNamespaceNotEmptyOfNodes)
 }
 
 func (s *Suite) TestRenameNamespace(c *check.C) {
@@ -76,20 +76,20 @@ func (s *Suite) TestRenameNamespace(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	_, err = app.GetNamespace("test")
-	c.Assert(err, check.Equals, errNamespaceNotFound)
+	c.Assert(err, check.Equals, ErrNamespaceNotFound)
 
 	_, err = app.GetNamespace("test-renamed")
 	c.Assert(err, check.IsNil)
 
 	err = app.RenameNamespace("test-does-not-exit", "test")
-	c.Assert(err, check.Equals, errNamespaceNotFound)
+	c.Assert(err, check.Equals, ErrNamespaceNotFound)
 
 	namespaceTest2, err := app.CreateNamespace("test2")
 	c.Assert(err, check.IsNil)
 	c.Assert(namespaceTest2.Name, check.Equals, "test2")
 
 	err = app.RenameNamespace("test2", "test-renamed")
-	c.Assert(err, check.Equals, errNamespaceExists)
+	c.Assert(err, check.Equals, ErrNamespaceExists)
 }
 
 func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
@@ -402,7 +402,7 @@ func (s *Suite) TestSetMachineNamespace(c *check.C) {
 	c.Assert(machine.Namespace.Name, check.Equals, newNamespace.Name)
 
 	err = app.SetMachineNamespace(&machine, "non-existing-namespace")
-	c.Assert(err, check.Equals, errNamespaceNotFound)
+	c.Assert(err, check.Equals, ErrNamespaceNotFound)
 
 	err = app.SetMachineNamespace(&machine, newNamespace.Name)
 	c.Assert(err, check.IsNil)
diff --git a/oidc.go b/oidc.go
index 8b5f024..cd0d918 100644
--- a/oidc.go
+++ b/oidc.go
@@ -416,7 +416,7 @@ func (h *Headscale) OIDCCallback(
 	log.Debug().Msg("Registering new machine after successful callback")
 
 	namespace, err := h.GetNamespace(namespaceName)
-	if errors.Is(err, errNamespaceNotFound) {
+	if errors.Is(err, ErrNamespaceNotFound) {
 		namespace, err = h.CreateNamespace(namespaceName)
 
 		if err != nil {
diff --git a/preauth_keys.go b/preauth_keys.go
index b32ff63..f120f45 100644
--- a/preauth_keys.go
+++ b/preauth_keys.go
@@ -14,10 +14,10 @@ import (
 )
 
 const (
-	errPreAuthKeyNotFound          = Error("AuthKey not found")
-	errPreAuthKeyExpired           = Error("AuthKey expired")
-	errSingleUseAuthKeyHasBeenUsed = Error("AuthKey has already been used")
-	errNamespaceMismatch           = Error("namespace mismatch")
+	ErrPreAuthKeyNotFound          = Error("AuthKey not found")
+	ErrPreAuthKeyExpired           = Error("AuthKey expired")
+	ErrSingleUseAuthKeyHasBeenUsed = Error("AuthKey has already been used")
+	ErrNamespaceMismatch           = Error("namespace mismatch")
 )
 
 // PreAuthKey describes a pre-authorization key usable in a particular namespace.
@@ -92,7 +92,7 @@ func (h *Headscale) GetPreAuthKey(namespace string, key string) (*PreAuthKey, er
 	}
 
 	if pak.Namespace.Name != namespace {
-		return nil, errNamespaceMismatch
+		return nil, ErrNamespaceMismatch
 	}
 
 	return pak, nil
@@ -135,11 +135,11 @@ func (h *Headscale) checkKeyValidity(k string) (*PreAuthKey, error) {
 		result.Error,
 		gorm.ErrRecordNotFound,
 	) {
-		return nil, errPreAuthKeyNotFound
+		return nil, ErrPreAuthKeyNotFound
 	}
 
 	if pak.Expiration != nil && pak.Expiration.Before(time.Now()) {
-		return nil, errPreAuthKeyExpired
+		return nil, ErrPreAuthKeyExpired
 	}
 
 	if pak.Reusable || pak.Ephemeral { // we don't need to check if has been used before
@@ -152,7 +152,7 @@ func (h *Headscale) checkKeyValidity(k string) (*PreAuthKey, error) {
 	}
 
 	if len(machines) != 0 || pak.Used {
-		return nil, errSingleUseAuthKeyHasBeenUsed
+		return nil, ErrSingleUseAuthKeyHasBeenUsed
 	}
 
 	return &pak, nil
diff --git a/preauth_keys_test.go b/preauth_keys_test.go
index c54c1bf..cd9c66a 100644
--- a/preauth_keys_test.go
+++ b/preauth_keys_test.go
@@ -44,13 +44,13 @@ func (*Suite) TestExpiredPreAuthKey(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	key, err := app.checkKeyValidity(pak.Key)
-	c.Assert(err, check.Equals, errPreAuthKeyExpired)
+	c.Assert(err, check.Equals, ErrPreAuthKeyExpired)
 	c.Assert(key, check.IsNil)
 }
 
 func (*Suite) TestPreAuthKeyDoesNotExist(c *check.C) {
 	key, err := app.checkKeyValidity("potatoKey")
-	c.Assert(err, check.Equals, errPreAuthKeyNotFound)
+	c.Assert(err, check.Equals, ErrPreAuthKeyNotFound)
 	c.Assert(key, check.IsNil)
 }
 
@@ -86,7 +86,7 @@ func (*Suite) TestAlreadyUsedKey(c *check.C) {
 	app.db.Save(&machine)
 
 	key, err := app.checkKeyValidity(pak.Key)
-	c.Assert(err, check.Equals, errSingleUseAuthKeyHasBeenUsed)
+	c.Assert(err, check.Equals, ErrSingleUseAuthKeyHasBeenUsed)
 	c.Assert(key, check.IsNil)
 }
 
@@ -174,7 +174,7 @@ func (*Suite) TestExpirePreauthKey(c *check.C) {
 	c.Assert(pak.Expiration, check.NotNil)
 
 	key, err := app.checkKeyValidity(pak.Key)
-	c.Assert(err, check.Equals, errPreAuthKeyExpired)
+	c.Assert(err, check.Equals, ErrPreAuthKeyExpired)
 	c.Assert(key, check.IsNil)
 }
 
@@ -188,5 +188,5 @@ func (*Suite) TestNotReusableMarkedAsUsed(c *check.C) {
 	app.db.Save(&pak)
 
 	_, err = app.checkKeyValidity(pak.Key)
-	c.Assert(err, check.Equals, errSingleUseAuthKeyHasBeenUsed)
+	c.Assert(err, check.Equals, ErrSingleUseAuthKeyHasBeenUsed)
 }
diff --git a/routes.go b/routes.go
index d062f82..23217ca 100644
--- a/routes.go
+++ b/routes.go
@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	errRouteIsNotAvailable = Error("route is not available")
+	ErrRouteIsNotAvailable = Error("route is not available")
 )
 
 // Deprecated: use machine function instead
@@ -106,7 +106,7 @@ func (h *Headscale) EnableNodeRoute(
 	}
 
 	if !available {
-		return errRouteIsNotAvailable
+		return ErrRouteIsNotAvailable
 	}
 
 	machine.EnabledRoutes = enabledRoutes
diff --git a/utils.go b/utils.go
index 87930a1..b436253 100644
--- a/utils.go
+++ b/utils.go
@@ -27,8 +27,8 @@ import (
 )
 
 const (
-	errCannotDecryptReponse = Error("cannot decrypt response")
-	errCouldNotAllocateIP   = Error("could not find any suitable IP")
+	ErrCannotDecryptResponse = Error("cannot decrypt response")
+	ErrCouldNotAllocateIP    = Error("could not find any suitable IP")
 
 	// These constants are copied from the upstream tailscale.com/types/key
 	// library, because they are not exported.
@@ -120,7 +120,7 @@ func decode(
 
 	decrypted, ok := privKey.OpenFrom(*pubKey, msg)
 	if !ok {
-		return errCannotDecryptReponse
+		return ErrCannotDecryptResponse
 	}
 
 	if err := json.Unmarshal(decrypted, output); err != nil {
@@ -181,7 +181,7 @@ func (h *Headscale) getAvailableIP(ipPrefix netaddr.IPPrefix) (*netaddr.IP, erro
 
 	for {
 		if !ipPrefix.Contains(ip) {
-			return nil, errCouldNotAllocateIP
+			return nil, ErrCouldNotAllocateIP
 		}
 
 		switch {