diff --git a/conversation/repository_mock.go b/conversation/repository_mock.go
index a13d179..e06857e 100644
--- a/conversation/repository_mock.go
+++ b/conversation/repository_mock.go
@@ -15,7 +15,7 @@ func NewMockRepo() *MockRepo {
 
 func (m *MockRepo) CheckForConversation(interviewID int) (bool, error) {
 	if m.FailRepo {
-		return false, errors.New("Mocked DB failure")
+		return false, errors.New("mocked DB failure")
 	}
 
 	return true, nil
@@ -23,7 +23,7 @@ func (m *MockRepo) CheckForConversation(interviewID int) (bool, error) {
 
 func (m *MockRepo) GetConversation(interviewID int) (*Conversation, error) {
 	if m.FailRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	conversationResponse := &Conversation{
@@ -70,7 +70,7 @@ func (m *MockRepo) GetConversation(interviewID int) (*Conversation, error) {
 
 func (m *MockRepo) CreateConversation(interviewId int, conversation *Conversation) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 0, nil
@@ -78,7 +78,7 @@ func (m *MockRepo) CreateConversation(interviewId int, conversation *Conversatio
 
 func (m *MockRepo) CreateQuestion(conversation *Conversation, prompt string) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 1, nil
@@ -86,7 +86,7 @@ func (m *MockRepo) CreateQuestion(conversation *Conversation, prompt string) (in
 
 func (m *MockRepo) CreateMessages(conversation *Conversation, messages []Message) error {
 	if m.FailRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -94,7 +94,7 @@ func (m *MockRepo) CreateMessages(conversation *Conversation, messages []Message
 
 func (m *MockRepo) AddMessage(conversationID, topic_id, questionNumber int, message Message) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 3, nil
@@ -102,7 +102,7 @@ func (m *MockRepo) AddMessage(conversationID, topic_id, questionNumber int, mess
 
 func (m *MockRepo) AddQuestion(question *Question) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 2, nil
@@ -110,7 +110,7 @@ func (m *MockRepo) AddQuestion(question *Question) (int, error) {
 
 func (m *MockRepo) GetMessages(conversationID, topic_id, questionNumber int) ([]Message, error) {
 	if m.FailRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	var messages = []Message{}
@@ -119,7 +119,7 @@ func (m *MockRepo) GetMessages(conversationID, topic_id, questionNumber int) ([]
 
 func (m *MockRepo) GetQuestions(Conversation *Conversation) ([]*Question, error) {
 	if m.FailRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	var questions = []*Question{}
@@ -128,7 +128,7 @@ func (m *MockRepo) GetQuestions(Conversation *Conversation) ([]*Question, error)
 
 func (m *MockRepo) UpdateConversationCurrents(conversationID, currentQuestionNumber, topicID int, subtopic string) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 1, nil
diff --git a/interview/repository_mock.go b/interview/repository_mock.go
index 4d090c5..ecd1c29 100644
--- a/interview/repository_mock.go
+++ b/interview/repository_mock.go
@@ -15,7 +15,7 @@ func NewMockRepo() *MockRepo {
 
 func (m *MockRepo) CreateInterview(interview *Interview) (int, error) {
 	if m.FailRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 1, nil
@@ -23,7 +23,7 @@ func (m *MockRepo) CreateInterview(interview *Interview) (int, error) {
 
 func (m *MockRepo) GetInterview(interviewID int) (*Interview, error) {
 	if m.FailRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	interview := &Interview{
@@ -45,7 +45,7 @@ func (m *MockRepo) GetInterview(interviewID int) (*Interview, error) {
 
 func (m *MockRepo) GetInterviewSummariesByUserID(userID int) ([]Summary, error) {
 	if m.FailRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	var summaries []Summary
@@ -63,7 +63,7 @@ func (m *MockRepo) GetInterviewSummariesByUserID(userID int) ([]Summary, error)
 
 func (m *MockRepo) UpdateScore(interviewID, pointsEarned int) error {
 	if m.FailRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -71,7 +71,7 @@ func (m *MockRepo) UpdateScore(interviewID, pointsEarned int) error {
 
 func (m *MockRepo) UpdateStatus(interviewID, userID int, status string) error {
 	if m.FailRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -79,7 +79,7 @@ func (m *MockRepo) UpdateStatus(interviewID, userID int, status string) error {
 
 func (m *MockRepo) LinkConversation(interviewID, conversationID int) error {
 	if m.FailRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -87,7 +87,7 @@ func (m *MockRepo) LinkConversation(interviewID, conversationID int) error {
 
 func (m *MockRepo) UpdateCreatedInterview(interview *Interview) error {
 	if m.FailRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
diff --git a/token/repository_mock.go b/token/repository_mock.go
index 91cf0e4..0bb0b73 100644
--- a/token/repository_mock.go
+++ b/token/repository_mock.go
@@ -12,7 +12,7 @@ func NewMockRepo() *MockRepo {
 
 func (m *MockRepo) AddRefreshToken(token *RefreshToken) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -20,11 +20,11 @@ func (m *MockRepo) AddRefreshToken(token *RefreshToken) error {
 
 func (m *MockRepo) GetStoredRefreshToken(userID int) (string, error) {
 	if m.failRepo {
-		return "", errors.New("Mocked DB failure")
+		return "", errors.New("mocked DB failure")
 	}
 
 	if userID != 1 {
-		return "", errors.New("UserID does not exist")
+		return "", errors.New("userID does not exist")
 	}
 
 	return "abc123", nil
@@ -32,7 +32,7 @@ func (m *MockRepo) GetStoredRefreshToken(userID int) (string, error) {
 
 func (m *MockRepo) DeleteRefreshToken(userID int) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
diff --git a/user/model.go b/user/model.go
index 1945dd7..bdaceed 100644
--- a/user/model.go
+++ b/user/model.go
@@ -53,5 +53,5 @@ type UserRepo interface {
 var (
 	ErrDuplicateEmail = errors.New("duplicate email")
 	ErrDuplicateUser  = errors.New("duplicate user")
-	ErrAccountDeleted = errors.New("Account is no longer active")
+	ErrAccountDeleted = errors.New("account is no longer active")
 )
diff --git a/user/repository_mock.go b/user/repository_mock.go
index 6dc182a..b0dbbf0 100644
--- a/user/repository_mock.go
+++ b/user/repository_mock.go
@@ -33,7 +33,7 @@ func NewMockRepo() *MockRepo {
 
 func (m *MockRepo) CreateUser(user *User) (int, error) {
 	if m.failRepo {
-		return 0, errors.New("Mocked DB failure")
+		return 0, errors.New("mocked DB failure")
 	}
 
 	return 1, nil
@@ -41,7 +41,7 @@ func (m *MockRepo) CreateUser(user *User) (int, error) {
 
 func (m *MockRepo) MarkUserDeleted(userID int) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -49,7 +49,7 @@ func (m *MockRepo) MarkUserDeleted(userID int) error {
 
 func (m *MockRepo) GetUser(userID int) (*User, error) {
 	if m.failRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	mockUser := &User{
@@ -65,7 +65,7 @@ func (m *MockRepo) GetUser(userID int) (*User, error) {
 
 func (m *MockRepo) GetPasswordandID(username string) (int, string, error) {
 	if m.failRepo {
-		return 0, "", errors.New("Mocked DB failure")
+		return 0, "", errors.New("mocked DB failure")
 	}
 
 	return 1, string(PasswordHashed), nil
@@ -73,10 +73,10 @@ func (m *MockRepo) GetPasswordandID(username string) (int, string, error) {
 
 func (m *MockRepo) GetUserByEmail(email string) (*User, error) {
 	if m.FailGetUserByEmail {
-		return nil, errors.New("Mocked GetUserByEmail failure")
+		return nil, errors.New("mocked GetUserByEmail failure")
 	}
 	if m.failRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	mockUser := &User{
@@ -91,7 +91,7 @@ func (m *MockRepo) GetUserByEmail(email string) (*User, error) {
 
 func (m *MockRepo) GetUserByCustomerID(customerID string) (*User, error) {
 	if m.failRepo {
-		return nil, errors.New("Mocked DB failure")
+		return nil, errors.New("mocked DB failure")
 	}
 
 	mockUser := &User{
@@ -106,7 +106,7 @@ func (m *MockRepo) GetUserByCustomerID(customerID string) (*User, error) {
 
 func (m *MockRepo) UpdatePasswordByEmail(email string, password []byte) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -114,10 +114,10 @@ func (m *MockRepo) UpdatePasswordByEmail(email string, password []byte) error {
 
 func (m *MockRepo) AddCredits(userID, credits int, creditType string) error {
 	if m.FailAddCredits {
-		return errors.New("Mocked AddCredits failure")
+		return errors.New("mocked AddCredits failure")
 	}
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -125,7 +125,7 @@ func (m *MockRepo) AddCredits(userID, credits int, creditType string) error {
 
 func (m *MockRepo) UpdateSubscriptionData(userID int, status, tier, subscriptionID string, startsAt, endsAt time.Time) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -133,7 +133,7 @@ func (m *MockRepo) UpdateSubscriptionData(userID int, status, tier, subscription
 
 func (m *MockRepo) UpdateSubscriptionStatusData(userID int, status string) error {
 	if m.failRepo {
-		return errors.New("Mocked DB failure")
+		return errors.New("mocked DB failure")
 	}
 
 	return nil
@@ -141,7 +141,7 @@ func (m *MockRepo) UpdateSubscriptionStatusData(userID int, status string) error
 
 func (m *MockRepo) HasActiveOrCancelledSubscription(email string) (bool, error) {
 	if m.failRepo {
-		return false, errors.New("Mocked DB failure")
+		return false, errors.New("mocked DB failure")
 	}
 
 	return true, nil
diff --git a/user/service.go b/user/service.go
index fe8be97..85a9583 100644
--- a/user/service.go
+++ b/user/service.go
@@ -173,7 +173,7 @@ func verifyResetToken(tokenString string) (string, error) {
 	if claims, ok := token.Claims.(*jwt.RegisteredClaims); ok && token.Valid {
 		return claims.Subject, nil
 	} else {
-		return "", errors.New("Invalid token")
+		return "", errors.New("invalid token")
 	}
 }