diff --git a/authority/error.go b/authority/error.go
deleted file mode 100644
index de1aa3c0..00000000
--- a/authority/error.go
+++ /dev/null
@@ -1,67 +0,0 @@
-package authority
-
-import (
-	"encoding/json"
-	"fmt"
-	"net/http"
-)
-
-type apiCtx map[string]interface{}
-
-// Error implements the api.Error interface and adds context to error messages.
-type apiError struct {
-	err     error
-	code    int
-	context apiCtx
-}
-
-// Cause implements the errors.Causer interface and returns the original error.
-func (e *apiError) Cause() error {
-	return e.err
-}
-
-// Error returns an error message with additional context.
-func (e *apiError) Error() string {
-	ret := e.err.Error()
-
-	/*
-		if len(e.context) > 0 {
-			ret += "\n\nContext:"
-			for k, v := range e.context {
-				ret += fmt.Sprintf("\n    %s: %v", k, v)
-			}
-		}
-	*/
-	return ret
-}
-
-// ErrorResponse represents an error in JSON format.
-type ErrorResponse struct {
-	Status  int    `json:"status"`
-	Message string `json:"message"`
-}
-
-// StatusCode returns an http status code indicating the type and severity of
-// the error.
-func (e *apiError) StatusCode() int {
-	if e.code == 0 {
-		return http.StatusInternalServerError
-	}
-	return e.code
-}
-
-// MarshalJSON implements json.Marshaller interface for the Error struct.
-func (e *apiError) MarshalJSON() ([]byte, error) {
-	return json.Marshal(&ErrorResponse{Status: e.code, Message: http.StatusText(e.code)})
-}
-
-// UnmarshalJSON implements json.Unmarshaler interface for the Error struct.
-func (e *apiError) UnmarshalJSON(data []byte) error {
-	var er ErrorResponse
-	if err := json.Unmarshal(data, &er); err != nil {
-		return err
-	}
-	e.code = er.Status
-	e.err = fmt.Errorf(er.Message)
-	return nil
-}
diff --git a/authority/provisioners_test.go b/authority/provisioners_test.go
index 1a45f209..94b2d715 100644
--- a/authority/provisioners_test.go
+++ b/authority/provisioners_test.go
@@ -69,8 +69,9 @@ func TestGetEncryptedKey(t *testing.T) {
 
 func TestGetProvisioners(t *testing.T) {
 	type gp struct {
-		a   *Authority
-		err *apiError
+		a    *Authority
+		err  error
+		code int
 	}
 	tests := map[string]func(t *testing.T) *gp{
 		"ok": func(t *testing.T) *gp {
@@ -89,14 +90,10 @@ func TestGetProvisioners(t *testing.T) {
 			ps, next, err := tc.a.GetProvisioners("", 0)
 			if err != nil {
 				if assert.NotNil(t, tc.err) {
-					switch v := err.(type) {
-					case *apiError:
-						assert.HasPrefix(t, v.err.Error(), tc.err.Error())
-						assert.Equals(t, v.code, tc.err.code)
-						assert.Equals(t, v.context, tc.err.context)
-					default:
-						t.Errorf("unexpected error type: %T", v)
-					}
+					sc, ok := err.(errs.StatusCoder)
+					assert.Fatal(t, ok, "error does not implement StatusCoder interface")
+					assert.Equals(t, sc.StatusCode(), tc.code)
+					assert.HasPrefix(t, err.Error(), tc.err.Error())
 				}
 			} else {
 				if assert.Nil(t, tc.err) {