diff --git a/member_roles.go b/member_roles.go
index a806afa73..d7efb9700 100644
--- a/member_roles.go
+++ b/member_roles.go
@@ -5,41 +5,48 @@ import (
 	"net/http"
 )
 
-const (
-	GuestBaseLevel BaseAccessLevel = 10
-)
-
-type BaseAccessLevel int
-
+// MemberRolesService handles communication with the member roles related methods of
+// the GitLab API.
+//
+// GitLab API docs: https://docs.gitlab.com/ee/api/member_roles.html
 type MemberRolesService struct {
 	client *Client
 }
 
+// MemberRole represents a GitLab member role.
+//
+// GitLab API docs: https://docs.gitlab.com/ee/api/member_roles.html
 type MemberRole struct {
-	ID                       int    `json:"id"`
-	Name                     string `json:"name"`
-	Description              string `json:"description,omitempty"`
-	GroupId                  int    `json:"group_id"`
-	BaseAccessLevel          int    `json:"base_access_level"`
-	AdminMergeRequests       bool   `json:"admin_merge_requests,omitempty"`
-	AdminVulnerability       bool   `json:"admin_vulnerability,omitempty"`
-	ReadCode                 bool   `json:"read_code,omitempty"`
-	ReadDependency           bool   `json:"read_dependency,omitempty"`
-	ReadVulnerability        bool   `json:"read_vulnerability,omitempty"`
-	ManageProjectAccessToken bool   `json:"manage_project_access_token,omitempty"`
+	ID                       int              `json:"id"`
+	Name                     string           `json:"name"`
+	Description              string           `json:"description,omitempty"`
+	GroupId                  int              `json:"group_id"`
+	BaseAccessLevel          AccessLevelValue `json:"base_access_level"`
+	AdminMergeRequests       bool             `json:"admin_merge_requests,omitempty"`
+	AdminVulnerability       bool             `json:"admin_vulnerability,omitempty"`
+	ReadCode                 bool             `json:"read_code,omitempty"`
+	ReadDependency           bool             `json:"read_dependency,omitempty"`
+	ReadVulnerability        bool             `json:"read_vulnerability,omitempty"`
+	ManageProjectAccessToken bool             `json:"manage_project_access_token,omitempty"`
 }
 
+// CreateMemberRoleOptions represents the available CreateMemberRole() options.
+//
+// GitLab API docs: https://docs.gitlab.com/ee/api/member_roles.html#add-a-member-role-to-a-group
 type CreateMemberRoleOptions struct {
-	Name               string          `json:"name,"`
-	BaseAccessLevel    BaseAccessLevel `json:"base_access_level"`
-	Description        string          `json:"description,omitempty"`
-	AdminMergeRequest  bool            `json:"admin_merge_request,omitempty"`
-	AdminVulnerability bool            `json:"admin_vulnerability,omitempty"`
-	ReadCode           bool            `json:"read_code,omitempty"`
-	ReadDependency     bool            `json:"read_dependency,omitempty"`
-	ReadVulnerability  bool            `json:"read_vulnerability,omitempty"`
+	Name               string           `json:"name,"`
+	BaseAccessLevel    AccessLevelValue `json:"base_access_level"`
+	Description        string           `json:"description,omitempty"`
+	AdminMergeRequest  bool             `json:"admin_merge_request,omitempty"`
+	AdminVulnerability bool             `json:"admin_vulnerability,omitempty"`
+	ReadCode           bool             `json:"read_code,omitempty"`
+	ReadDependency     bool             `json:"read_dependency,omitempty"`
+	ReadVulnerability  bool             `json:"read_vulnerability,omitempty"`
 }
 
+// ListMemberRoles gets a list of member roles for a specified group.
+//
+// Gitlab API docs: https://docs.gitlab.com/ee/api/member_roles.html#list-all-member-roles-of-a-group
 func (s *MemberRolesService) ListMemberRoles(groupId int, options ...RequestOptionFunc) ([]*MemberRole, *Response, error) {
 	path := fmt.Sprintf("groups/%d/member_roles", groupId)
 	req, err := s.client.NewRequest(http.MethodGet, path, nil, options)
@@ -56,6 +63,9 @@ func (s *MemberRolesService) ListMemberRoles(groupId int, options ...RequestOpti
 	return memberRoles, resp, nil
 }
 
+// CreateMemberRole creates a new member role for a specified group.
+//
+// Gitlab API docs: https://docs.gitlab.com/ee/api/member_roles.html#add-a-member-role-to-a-group
 func (s *MemberRolesService) CreateMemberRole(groupId int, opt *CreateMemberRoleOptions, options ...RequestOptionFunc) (*MemberRole, *Response, error) {
 	path := fmt.Sprintf("groups/%d/member_roles", groupId)
 	req, err := s.client.NewRequest(http.MethodPost, path, opt, options)
@@ -72,6 +82,9 @@ func (s *MemberRolesService) CreateMemberRole(groupId int, opt *CreateMemberRole
 	return memberRole, resp, nil
 }
 
+// DeleteMemberRole deletes a member role from a specified group.
+//
+// Gitlab API docs: https://docs.gitlab.com/ee/api/member_roles.html#remove-member-role-of-a-group
 func (s *MemberRolesService) DeleteMemberRole(groupId, memberRoleId int, options ...RequestOptionFunc) (*Response, error) {
 	path := fmt.Sprintf("groups/%d/member_roles/%d", groupId, memberRoleId)
 	req, err := s.client.NewRequest(http.MethodDelete, path, nil, options)
diff --git a/member_roles_test.go b/member_roles_test.go
index e5dfc8f50..00c72011b 100644
--- a/member_roles_test.go
+++ b/member_roles_test.go
@@ -64,7 +64,7 @@ func TestCreateMemberRole(t *testing.T) {
 
 	memberRole, _, err := client.MemberRolesService.CreateMemberRole(84, &CreateMemberRoleOptions{
 		Name:               "Custom guest",
-		BaseAccessLevel:    10,
+		BaseAccessLevel:    GuestPermissions,
 		Description:        "a sample custom role",
 		AdminMergeRequest:  false,
 		AdminVulnerability: false,
@@ -78,7 +78,7 @@ func TestCreateMemberRole(t *testing.T) {
 		ID:                       3,
 		Name:                     "Custom guest",
 		Description:              "a sample custom role",
-		BaseAccessLevel:          10,
+		BaseAccessLevel:          GuestPermissions,
 		GroupId:                  84,
 		AdminMergeRequests:       false,
 		AdminVulnerability:       false,