diff --git a/config/config_test.go b/config/config_test.go
new file mode 100644
index 00000000..7d41f7f5
--- /dev/null
+++ b/config/config_test.go
@@ -0,0 +1,141 @@
+// Package config provides interfaces and utilities for different Cluster
+// components to register, read, write and validate configuration sections
+// stored in a central configuration file.
+package config_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"reflect"
+	"testing"
+
+	ipfscluster "github.com/ipfs/ipfs-cluster"
+	"github.com/ipfs/ipfs-cluster/api/ipfsproxy"
+	"github.com/ipfs/ipfs-cluster/api/rest"
+	"github.com/ipfs/ipfs-cluster/config"
+	"github.com/ipfs/ipfs-cluster/pintracker/maptracker"
+)
+
+func setupConfigManager() *config.Manager {
+	cfg := config.NewManager()
+	clusterCfg := &ipfscluster.Config{}
+	apiCfg := &rest.Config{}
+	ipfsproxyCfg := &ipfsproxy.Config{}
+	maptrackerCfg := &maptracker.Config{}
+	cfg.RegisterComponent(config.Cluster, clusterCfg)
+	cfg.RegisterComponent(config.API, apiCfg)
+	cfg.RegisterComponent(config.API, ipfsproxyCfg)
+	cfg.RegisterComponent(config.PinTracker, maptrackerCfg)
+	return cfg
+}
+
+func TestManager_ToJSON(t *testing.T) {
+	var want1 bytes.Buffer
+	json.Compact(&want1, []byte(`{
+"api": {
+"ipfsproxy": {
+"listen_multiaddress": "/ip4/127.0.0.1/tcp/9095",
+"node_multiaddress": "/ip4/127.0.0.1/tcp/5001",
+"read_timeout": "0s",
+"read_header_timeout": "5s",
+"write_timeout": "0s",
+"idle_timeout": "1m0s",
+"extract_headers_path": "/api/v0/version",
+"extract_headers_ttl": "5m0s"
+},
+"restapi": {
+"http_listen_multiaddress": "/ip4/127.0.0.1/tcp/9094",
+"read_timeout": "0s",
+"read_header_timeout": "5s",
+"write_timeout": "0s",
+"idle_timeout": "2m0s",
+"basic_auth_credentials": null,
+"headers": {},
+"cors_allowed_origins": [
+"*"
+],
+"cors_allowed_methods": [
+"GET"
+],
+"cors_allowed_headers": [],
+"cors_exposed_headers": [
+"Content-Type",
+"X-Stream-Output",
+"X-Chunked-Output",
+"X-Content-Length"
+],
+"cors_allow_credentials": true,
+"cors_max_age": "0s"
+}
+},
+"pin_tracker": {
+"maptracker": {
+"max_pin_queue_size": 50000,
+"concurrent_pins": 10
+}
+}
+}`))
+	tests := []struct {
+		name    string
+		want    []byte
+		wantErr bool
+	}{
+		{
+			"basic default config",
+			want1.Bytes(),
+			false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfgMgr := setupConfigManager()
+			err := cfgMgr.Default()
+			if err != nil {
+				t.Fatal(err)
+			}
+			got, err := cfgMgr.ToJSON()
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Manager.ToJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			// Extract non-cluster config sections as cluster section just with each run.
+
+			// api section
+			gotapi, err := extractJsonSection("api", got)
+			if err != nil {
+				t.Fatal(err)
+			}
+			wantapi, err := extractJsonSection("api", tt.want)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if !reflect.DeepEqual(gotapi, wantapi) {
+				t.Errorf("api section not the same: got: %s want: %s", gotapi, wantapi)
+			}
+
+			// pintracker section
+			gotpintracker, err := extractJsonSection("pin_tracker", got)
+			if err != nil {
+				t.Fatal(err)
+			}
+			wantpintracker, err := extractJsonSection("pin_tracker", tt.want)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if !reflect.DeepEqual(gotpintracker, wantpintracker) {
+				t.Errorf("api section not the same: got: %s want: %s", gotpintracker, wantpintracker)
+			}
+		})
+	}
+}
+
+func extractJsonSection(name string, rawSection []byte) ([]byte, error) {
+	var section map[string]interface{}
+	json.Unmarshal(rawSection, &section)
+	jsection, err := json.Marshal(section[name].(map[string]interface{}))
+	if err != nil {
+		return nil, err
+	}
+	return jsection, nil
+}