diff --git a/cmd/namespace/validate.go b/cmd/namespace/validate.go
index c33be048b..e995c994e 100644
--- a/cmd/namespace/validate.go
+++ b/cmd/namespace/validate.go
@@ -2,7 +2,6 @@ package namespace
 
 import (
 	"bytes"
-	"context"
 	"fmt"
 	"io/ioutil"
 
@@ -147,7 +146,7 @@ func validateConfigFile(cmd *cobra.Command, fn string) error {
 		switch t := ns.(type) {
 		case string:
 			logger := logrusx.New("cmd", "0")
-			cw, err := config.NewNamespaceWatcher(context.Background(), logger, t)
+			cw, err := config.NewNamespaceWatcher(cmd.Context(), logger, t)
 			if err != nil {
 				_, _ = fmt.Fprintf(cmd.ErrOrStderr(), "Encountered error reading config: %+v\n", err)
 				return cmdx.FailSilently(cmd)
@@ -188,7 +187,7 @@ func validateConfigFile(cmd *cobra.Command, fn string) error {
 			}
 			return nil
 		default:
-			_, _ = fmt.Fprintf(cmd.ErrOrStderr(), "unknown type for key 'namespaces' in config file: %v\n", t)
+			_, _ = fmt.Fprintf(cmd.ErrOrStderr(), "unknown type %T for key 'namespaces' in config file: %v\n", t, t)
 			return cmdx.FailSilently(cmd)
 		}
 	} else {
diff --git a/cmd/namespace/validate_test.go b/cmd/namespace/validate_test.go
index 4d21e6d4c..4ec6c8315 100644
--- a/cmd/namespace/validate_test.go
+++ b/cmd/namespace/validate_test.go
@@ -3,6 +3,7 @@ package namespace
 import (
 	"fmt"
 	"io/ioutil"
+	"path/filepath"
 	"testing"
 
 	"github.com/ory/x/cmdx"
@@ -50,13 +51,13 @@ func TestValidateConfigNamespaces(t *testing.T) {
 
 	t.Run("case=read valid config with embedded namespaces", func(t *testing.T) {
 		dir := t.TempDir()
-		fnyaml := dir + "/keto.yaml"
+		fnyaml := filepath.Join(dir, "keto.yaml")
 		require.NoError(t, ioutil.WriteFile(fnyaml, []byte(configEmbeddedYaml), fileMode))
 
-		fnjson := dir + "/keto.json"
+		fnjson := filepath.Join(dir, "keto.json")
 		require.NoError(t, ioutil.WriteFile(fnjson, []byte(configEmbeddedJson), fileMode))
 
-		fntoml := dir + "/keto.toml"
+		fntoml := filepath.Join(dir, "keto.toml")
 		require.NoError(t, ioutil.WriteFile(fntoml, []byte(configEmbeddedToml), fileMode))
 
 		stdOut := cmd.ExecNoErr(t, "validate", "-c", fnyaml+","+fnjson+","+fntoml)
@@ -66,9 +67,9 @@ func TestValidateConfigNamespaces(t *testing.T) {
 	t.Run("case=supports 3 namespace file formats", func(t *testing.T) {
 		dir := t.TempDir()
 		nsfiles := map[string]string{
-			dir + "/ns.yaml": "name: testns0\nid: 0",
-			dir + "/ns.json": "{\"name\": \"testns0\",\"id\": 0}",
-			dir + "/ns.toml": "name = \"testns0\"\nid = 0",
+			filepath.Join(dir, "ns.yaml"): "name: testns0\nid: 0",
+			filepath.Join(dir, "ns.json"): "{\"name\": \"testns0\",\"id\": 0}",
+			filepath.Join(dir, "ns.toml"): "name = \"testns0\"\nid = 0",
 		}
 		for fn, contents := range nsfiles {
 			require.NoError(t, ioutil.WriteFile(fn, []byte(contents), fileMode))
@@ -79,7 +80,7 @@ func TestValidateConfigNamespaces(t *testing.T) {
 	})
 
 	t.Run("case=unknown namespace format gives error", func(t *testing.T) {
-		fn := t.TempDir() + "/ns.txt"
+		fn := filepath.Join(t.TempDir(), "ns.txt")
 		require.NoError(t, ioutil.WriteFile(fn, []byte("name: ns\nid: 0"), fileMode))
 
 		stdOut := cmd.ExecExpectedErr(t, "validate", fn)
@@ -87,7 +88,7 @@ func TestValidateConfigNamespaces(t *testing.T) {
 	})
 
 	t.Run("case=config passed as varg fails", func(t *testing.T) {
-		fn := t.TempDir() + "/keto.yaml"
+		fn := filepath.Join(t.TempDir(), "keto.yaml")
 		require.NoError(t, ioutil.WriteFile(fn, []byte(configEmbeddedYaml), fileMode))
 
 		// interprets config file as namespace file when `-c` flag is not passed
@@ -96,7 +97,7 @@ func TestValidateConfigNamespaces(t *testing.T) {
 	})
 
 	t.Run("case=read config with invalid embedded namespace", func(t *testing.T) {
-		fn := t.TempDir() + "/keto.yaml"
+		fn := filepath.Join(t.TempDir(), "keto.yaml")
 		require.NoError(t, ioutil.WriteFile(fn, []byte(`{"namespaces":[{"id":"x","name":"x"}]}`), fileMode))
 
 		stdOut := cmd.ExecExpectedErr(t, "validate", "--config", fn)
@@ -106,9 +107,9 @@ func TestValidateConfigNamespaces(t *testing.T) {
 
 	t.Run("case=read config with namespace as dir reference", func(t *testing.T) {
 		nsdir := t.TempDir()
-		fn := t.TempDir() + "/config.yaml"
-		require.NoError(t, ioutil.WriteFile(nsdir+"/ns0.yaml", []byte(nsyaml), fileMode))
-		require.NoError(t, ioutil.WriteFile(nsdir+"/ns1.json", []byte(nsjson), fileMode))
+		fn := filepath.Join(t.TempDir(), "config.yaml")
+		require.NoError(t, ioutil.WriteFile(filepath.Join(nsdir, "ns0.yaml"), []byte(nsyaml), fileMode))
+		require.NoError(t, ioutil.WriteFile(filepath.Join(nsdir, "ns1.json"), []byte(nsjson), fileMode))
 		require.NoError(t, ioutil.WriteFile(fn, []byte(fmt.Sprintf(configReference, nsdir)), fileMode))
 
 		cmd.PersistentArgs = []string{}
@@ -121,8 +122,8 @@ func TestValidateConfigNamespaces(t *testing.T) {
 
 	t.Run("case=read config with dir reference bad namespaces", func(t *testing.T) {
 		nsdir := t.TempDir()
-		fn := t.TempDir() + "/config.yaml"
-		require.NoError(t, ioutil.WriteFile(nsdir+"/ns0.yaml", []byte("name: badId\nid: foo"), fileMode))
+		fn := filepath.Join(t.TempDir(), "config.yaml")
+		require.NoError(t, ioutil.WriteFile(filepath.Join(nsdir, "ns0.yaml"), []byte("name: badId\nid: foo"), fileMode))
 		require.NoError(t, ioutil.WriteFile(fn, []byte(fmt.Sprintf(configReference, nsdir)), fileMode))
 
 		cmd.PersistentArgs = []string{}
@@ -136,7 +137,7 @@ func validateCommand() *cobra.Command {
 		Use:   "keto",
 		Short: "Global and consistent permission and authorization server",
 	}
-	configx.RegisterConfigFlag(cmd.PersistentFlags(), []string{"/tmp/non-exist.yaml"})
+	configx.RegisterConfigFlag(cmd.PersistentFlags(), []string{})
 	cmd.AddCommand(NewValidateCmd())
 	return cmd
 }