diff --git a/core/sentry.go b/core/sentry.go
index 763ef73..e346552 100644
--- a/core/sentry.go
+++ b/core/sentry.go
@@ -272,7 +272,7 @@ func (t *SentryTaggedStruct) GetProperty(v interface{}, property string) (name s
 	}
 
 	if val.Kind() != reflect.Struct {
-		err = fmt.Errorf("passed value must be struct, %s provided", val.String())
+		err = fmt.Errorf("passed value must be struct, %s provided", val.Type().String())
 		return
 	}
 
diff --git a/core/sentry_test.go b/core/sentry_test.go
index c263168..5f197e1 100644
--- a/core/sentry_test.go
+++ b/core/sentry_test.go
@@ -32,6 +32,7 @@ func (s *SentryTest) SetupTest() {
 	require.Equal(s.T(), "", s.structTags.GetName())
 	require.Equal(s.T(), "Scalar", s.scalarTags.GetName())
 	s.structTags.Tags = map[string]string{}
+	s.sentry = NewSentry("dsn", "unknown_error", SentryTaggedTypes{}, nil, nil)
 }
 
 func (s *SentryTest) TestStruct_AddTag() {
@@ -62,9 +63,9 @@ func (s *SentryTest) TestStruct_GetProperty_InvalidStruct() {
 }
 
 func (s *SentryTest) TestStruct_GetProperty_GotScalar() {
-	_, _, err := s.structTags.GetProperty("str", "Field")
+	_, _, err := s.structTags.GetProperty("", "Field")
 	require.Error(s.T(), err)
-	assert.Equal(s.T(), "passed value must be struct, str provided", err.Error())
+	assert.Equal(s.T(), "passed value must be struct, string provided", err.Error())
 }
 
 func (s *SentryTest) TestStruct_GetProperty_InvalidType() {
@@ -86,6 +87,88 @@ func (s *SentryTest) TestStruct_GetProperty_InvalidProperty() {
 	assert.Equal(s.T(), "invalid property, got <invalid Value>", err.Error())
 }
 
+func (s *SentryTest) TestStruct_BuildTags_Fail() {
+	s.structTags.Tags = map[string]string{}
+	s.structTags.AddTag("test", "Field")
+	_, err := s.structTags.BuildTags(false)
+	assert.Error(s.T(), err)
+}
+
+func (s *SentryTest) TestStruct_BuildTags() {
+	s.structTags.Tags = map[string]string{}
+	s.structTags.AddTag("test", "Field")
+	tags, err := s.structTags.BuildTags(SampleStruct{Field: "value"})
+
+	require.NoError(s.T(), err)
+	require.NotEmpty(s.T(), tags)
+	i, ok := tags["test"]
+	require.True(s.T(), ok)
+	assert.Equal(s.T(), "value", i)
+}
+
+func (s *SentryTest) TestScalar_Get_Nil() {
+	_, err := s.scalarTags.Get(nil)
+	require.Error(s.T(), err)
+	assert.Equal(s.T(), "invalid value provided", err.Error())
+}
+
+func (s *SentryTest) TestScalar_Get_Struct() {
+	_, err := s.scalarTags.Get(struct{}{})
+	require.Error(s.T(), err)
+	assert.Equal(s.T(), "passed value must not be struct", err.Error())
+}
+
+func (s *SentryTest) TestScalar_Get_InvalidType() {
+	_, err := s.scalarTags.Get(false)
+	require.Error(s.T(), err)
+	assert.Equal(s.T(), "passed value should be of type `string`, got `bool` instead", err.Error())
+}
+
+func (s *SentryTest) TestScalar_Get() {
+	val, err := s.scalarTags.Get("test")
+	require.NoError(s.T(), err)
+	assert.Equal(s.T(), "test", val)
+}
+
+func (s *SentryTest) TestScalar_GetTags() {
+	assert.Empty(s.T(), s.scalarTags.GetTags())
+}
+
+func (s *SentryTest) TestScalar_BuildTags_Fail() {
+	_, err := s.scalarTags.BuildTags(false)
+	assert.Error(s.T(), err)
+}
+
+func (s *SentryTest) TestScalar_BuildTags() {
+	tags, err := s.scalarTags.BuildTags("test")
+
+	require.NoError(s.T(), err)
+	require.NotEmpty(s.T(), tags)
+	i, ok := tags[s.scalarTags.GetName()]
+	require.True(s.T(), ok)
+	assert.Equal(s.T(), "test", i)
+}
+
+func (s *SentryTest) TestSentry_ErrorMiddleware() {
+	assert.NotNil(s.T(), s.sentry.ErrorMiddleware())
+}
+
+func (s *SentryTest) TestSentry_PanicLogger() {
+	assert.NotNil(s.T(), s.sentry.PanicLogger())
+}
+
+func (s *SentryTest) TestSentry_ErrorLogger() {
+	assert.NotNil(s.T(), s.sentry.ErrorLogger())
+}
+
+func (s *SentryTest) TestSentry_ErrorResponseHandler() {
+	assert.NotNil(s.T(), s.sentry.ErrorResponseHandler())
+}
+
+func (s *SentryTest) TestSentry_ErrorCaptureHandler() {
+	assert.NotNil(s.T(), s.sentry.ErrorCaptureHandler())
+}
+
 func TestSentry_newRavenStackTrace_Fail(t *testing.T) {
 	defer func() {
 		assert.NotNil(t, recover())
diff --git a/go.sum b/go.sum
index c150edd..c4b4ba9 100644
--- a/go.sum
+++ b/go.sum
@@ -183,8 +183,10 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=