diff --git a/go.mod b/go.mod
index 158b8e2..3a2a379 100644
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,7 @@ module github.com/glassonion1/logz
 go 1.15
 
 require (
-	github.com/glassonion1/logz/go111 v0.1.1 // indirect
 	github.com/google/go-cmp v0.5.4
-	github.com/google/uuid v1.1.2
 	go.opentelemetry.io/otel v0.15.0
 	go.opentelemetry.io/otel/sdk v0.15.0
 
diff --git a/go.sum b/go.sum
index aeb0dbf..1f30680 100644
--- a/go.sum
+++ b/go.sum
@@ -1,78 +1,25 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/DataDog/sketches-go v0.0.1 h1:RtG+76WKgZuz6FIaGsjoPePmadDBkuD/KC6+ZWu78b8=
 github.com/DataDog/sketches-go v0.0.1/go.mod h1:Q5DbzQ+3AkgGwymQO7aZFNP7ns2lZKGtvRBzRXfdi60=
 github.com/benbjohnson/clock v1.0.3 h1:vkLuvpK4fmtSCuo60+yC63p7y0BmQ8gm5ZXGuBCJyXg=
 github.com/benbjohnson/clock v1.0.3/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/glassonion1/logz/go111 v0.1.1 h1:4MNqP4UqcCd/KedomB9YJXHEhboz4X6zc+J0D6V6Iig=
-github.com/glassonion1/logz/go111 v0.1.1/go.mod h1:E2VuQzzVYCt9ZNdTPWlE53KzlN1pYu0adoqY16FAjtE=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
-github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.1.0 h1:Hsa8mG0dQ46ij8Sl2AYJDUv1oA9/d6Vk+3LG99Oe02g=
 github.com/google/gofuzz v1.1.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
-github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-go.opencensus.io v0.22.5 h1:dntmOdLpSpHlVqbW5Eay97DelsZHe+55D+xC6i0dDS0=
-go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
-go.opentelemetry.io/otel v0.14.0 h1:YFBEfjCk9MTjaytCNSUkp9Q8lF7QJezA06T71FbQxLQ=
-go.opentelemetry.io/otel v0.14.0/go.mod h1:vH5xEuwy7Rts0GNtsCW3HYQoZDY+OmBJ6t1bFGGlxgw=
 go.opentelemetry.io/otel v0.15.0 h1:CZFy2lPhxd4HlhZnYK8gRyDotksO3Ip9rBweY1vVYJw=
 go.opentelemetry.io/otel v0.15.0/go.mod h1:e4GKElweB8W2gWUqbghw0B8t5MCTccc9212eNHnOHwA=
-go.opentelemetry.io/otel/sdk v0.14.0 h1:Pqgd85y5XhyvHQlOxkKW+FD4DAX7AoeaNIDKC2VhfHQ=
-go.opentelemetry.io/otel/sdk v0.14.0/go.mod h1:kGO5pEMSNqSJppHAm8b73zztLxB5fgDQnD56/dl5xqE=
 go.opentelemetry.io/otel/sdk v0.15.0 h1:Hf2dl1Ad9Hn03qjcAuAq51GP5Pv1SV5puIkS2nRhdd8=
 go.opentelemetry.io/otel/sdk v0.15.0/go.mod h1:Qudkwgq81OcA9GYVlbyZ62wkLieeS1eWxIL0ufxgwoc=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
-golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
-golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/internal/logger/logger.go b/internal/logger/logger.go
index 10e22d6..5e783e6 100644
--- a/internal/logger/logger.go
+++ b/internal/logger/logger.go
@@ -26,7 +26,7 @@ func WriteApplicationLog(ctx context.Context, severity severity.Severity, format
 	// Gets the traceID and spanID
 	sc := spancontext.Extract(ctx)
 
-	// gets the source location
+	// Gets the source location
 	var location types.SourceLocation
 	if pc, file, line, ok := runtime.Caller(2); ok {
 		if function := runtime.FuncForPC(pc); function != nil {
diff --git a/internal/logger/logger_test.go b/internal/logger/logger_test.go
index bb4cc63..018b4cf 100644
--- a/internal/logger/logger_test.go
+++ b/internal/logger/logger_test.go
@@ -23,9 +23,9 @@ The format of application log is below
   "message":"writes info log",
   "time":"2020-12-31T23:59:59.999999999Z",
   "logging.googleapis.com/sourceLocation":{
-    "file":"testing.go",
-    "line":"1127",
-    "function":"testing.tRunner"
+    "file":"logger_test.go",
+    "line":"57",
+    "function":"github.com/glassonion1/logz/internal/logger_test.TestLoggerWriteApplicationLog.func3"
   },
   "logging.googleapis.com/trace":"projects/test/traces/00000000000000000000000000000000",
   "logging.googleapis.com/spanId":"0000000000000000",
@@ -52,7 +52,10 @@ func TestLoggerWriteApplicationLog(t *testing.T) {
 		os.Stdout = w
 
 		// Tests the function
-		logger.WriteApplicationLog(ctx, severity.Info, "writes %s log", "info")
+		func() {
+			// Wrapped in a function to have the source location output the intended string
+			logger.WriteApplicationLog(ctx, severity.Info, "writes %s log", "info")
+		}()
 
 		w.Close()
 
@@ -64,7 +67,7 @@ func TestLoggerWriteApplicationLog(t *testing.T) {
 		// Gets the log from buffer.
 		got := strings.TrimRight(buf.String(), "\n")
 
-		expected := `{"severity":"INFO","message":"writes info log","time":"2020-12-31T23:59:59.999999999Z","logging.googleapis.com/sourceLocation":{"file":"testing.go","line":"1127","function":"testing.tRunner"},"logging.googleapis.com/trace":"projects/test/traces/00000000000000000000000000000000","logging.googleapis.com/spanId":"0000000000000000","logging.googleapis.com/trace_sampled":false}`
+		expected := `{"severity":"INFO","message":"writes info log","time":"2020-12-31T23:59:59.999999999Z","logging.googleapis.com/sourceLocation":{"file":"logger_test.go","line":"57","function":"github.com/glassonion1/logz/internal/logger_test.TestLoggerWriteApplicationLog.func3"},"logging.googleapis.com/trace":"projects/test/traces/00000000000000000000000000000000","logging.googleapis.com/spanId":"0000000000000000","logging.googleapis.com/trace_sampled":false}`
 
 		if diff := cmp.Diff(got, expected); diff != "" {
 			// Restores the stdout
diff --git a/logz_test.go b/logz_test.go
index 03ea448..0b2c55d 100644
--- a/logz_test.go
+++ b/logz_test.go
@@ -18,6 +18,7 @@ func TestLogz(t *testing.T) {
 	logz.InitTracer()
 
 	t.Run("Tests logz integration", func(t *testing.T) {
+		t.Parallel()
 
 		mux := http.NewServeMux()
 		mux.Handle("/test1", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -78,6 +79,7 @@ func TestLogzRemoteParent(t *testing.T) {
 	logz.InitTracer()
 
 	t.Run("Tests logz integration with remote parent", func(t *testing.T) {
+		t.Parallel()
 
 		mux := http.NewServeMux()
 		mux.Handle("/test1", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {