diff --git a/store/memory_store_test.go b/store/memory_store_test.go
index 5a89649..badfd80 100644
--- a/store/memory_store_test.go
+++ b/store/memory_store_test.go
@@ -1,75 +1,94 @@
 package store
 
 import (
-	oauth22 "github.com/dpattmann/furby/oauth2"
+	"net/http"
 	"testing"
 	"time"
 
+	furbyOauth2 "github.com/dpattmann/furby/oauth2"
+
 	"github.com/jarcoal/httpmock"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/oauth2"
 )
 
 var (
-	mockClientConfig = oauth22.NewClientCredentialsConfig("ClientIdValue", "ClientSecretValue", "http://localhost:8081", []string{})
+	validMockClientConfig   = furbyOauth2.NewClientCredentialsConfig("ClientIdValue", "ClientSecretValue", "http://localhost:8080", []string{})
+	invalidMockClientConfig = furbyOauth2.NewClientCredentialsConfig("ClientIdValue", "ClientSecretValue", "http://localhost:8081", []string{})
 )
 
 func TestStore_GetToken(t *testing.T) {
+	// Setup http mock backend
 	httpmock.Activate()
 	defer httpmock.DeactivateAndReset()
 
-	httpmock.RegisterResponder("POST", "http://localhost:8081", httpmock.NewJsonResponderOrPanic(200, oauth2.Token{
+	expirationDate := time.Now().Add(time.Minute * 5)
+	httpmock.RegisterResponder("POST", "http://localhost:8080", httpmock.NewJsonResponderOrPanic(http.StatusOK, oauth2.Token{
 		AccessToken: "AccessTokenValue",
 		TokenType:   "TokenTypeValue",
+		Expiry:      expirationDate,
 	}))
 
-	tokenStore := NewMemoryStore(mockClientConfig)
+	httpmock.RegisterResponder("POST", "http://localhost:8081", httpmock.NewStringResponder(400, "Invalid Token Request"))
+
+	validTokenStore := NewMemoryStore(validMockClientConfig)
+	invalidTokenStore := NewMemoryStore(invalidMockClientConfig)
 
-	testToken := &oauth2.Token{
+	wantedToken := &oauth2.Token{
 		AccessToken: "AccessTokenValue",
 		TokenType:   "TokenTypeValue",
+		Expiry:      expirationDate,
 	}
+	// mock backend ready
 
-	token, err := tokenStore.GetToken()
+	t.Run("Get new token from token server", func(t *testing.T) {
+		assert.Equal(t, 0, httpmock.GetTotalCallCount())
+		token, err := validTokenStore.GetToken()
 
-	assert.NoError(t, err)
-	assert.Equal(t, testToken.AccessToken, token.AccessToken)
-	assert.Equal(t, testToken.TokenType, token.TokenType)
-}
+		assert.NoError(t, err)
+		assert.Equal(t, wantedToken.AccessToken, token.AccessToken)
+		assert.Equal(t, wantedToken.TokenType, token.TokenType)
+		assert.Equal(t, 1, httpmock.GetTotalCallCount())
+	})
 
-func TestStore_ErrorGettingToken(t *testing.T) {
-	httpmock.Activate()
-	defer httpmock.DeactivateAndReset()
+	t.Run("Get valid token from store", func(t *testing.T) {
+		token, err := validTokenStore.GetToken()
 
-	httpmock.RegisterResponder("POST", "http://localhost:8081", httpmock.NewStringResponder(400, "Invalid Token Request"))
+		assert.NoError(t, err)
+		assert.Equal(t, wantedToken.AccessToken, token.AccessToken)
+		assert.Equal(t, wantedToken.TokenType, token.TokenType)
+		assert.Equal(t, 1, httpmock.GetTotalCallCount())
+	})
 
-	tokenStore := NewMemoryStore(mockClientConfig)
+	t.Run("Get error from token server", func(t *testing.T) {
+		_, err := invalidTokenStore.GetToken()
 
-	_ = &oauth2.Token{
-		AccessToken: "AccessTokenValue",
-		TokenType:   "TokenTypeValue",
-	}
-
-	_, err := tokenStore.GetToken()
-
-	assert.Error(t, err)
+		assert.Error(t, err)
+	})
 }
 
-func TestStore_ReturnValidToken(t *testing.T) {
-	tokenStore := NewMemoryStore(mockClientConfig)
+func BenchmarkGetToken1(b *testing.B)     { benchmarkGetTokenWithOneSecondHttpDelay(b) }
+func BenchmarkGetToken10(b *testing.B)    { benchmarkGetTokenWithOneSecondHttpDelay(b) }
+func BenchmarkGetToken100(b *testing.B)   { benchmarkGetTokenWithOneSecondHttpDelay(b) }
+func BenchmarkGetToken1000(b *testing.B)  { benchmarkGetTokenWithOneSecondHttpDelay(b) }
+func BenchmarkGetToken10000(b *testing.B) { benchmarkGetTokenWithOneSecondHttpDelay(b) }
 
-	date := time.Now().Add(time.Minute * 5)
+func benchmarkGetTokenWithOneSecondHttpDelay(b *testing.B) {
+	httpmock.Activate()
+	defer httpmock.DeactivateAndReset()
 
-	testToken := &oauth2.Token{
-		AccessToken: "AccessTokenValue",
-		TokenType:   "TokenTypeValue",
-		Expiry:      date,
-	}
+	httpmock.RegisterResponder("POST", "http://localhost:8081", func(request *http.Request) (*http.Response, error) {
+		time.Sleep(1 * time.Second)
 
-	tokenStore.setToken(testToken)
-	token, err := tokenStore.GetToken()
+		return httpmock.NewJsonResponse(http.StatusOK, oauth2.Token{
+			AccessToken: "AccessTokenValue",
+			TokenType:   "TokenTypeValue",
+		})
+	})
 
-	assert.NoError(t, err)
-	assert.Equal(t, testToken.AccessToken, token.AccessToken)
-	assert.Equal(t, testToken.TokenType, token.TokenType)
+	tokenStore := NewMemoryStore(validMockClientConfig)
+
+	for i := 0; i < b.N; i++ {
+		_, _ = tokenStore.GetToken()
+	}
 }