diff --git a/cmd/web/handlers_test.go b/cmd/web/handlers_test.go
index 37ec9bf..c7cc86a 100644
--- a/cmd/web/handlers_test.go
+++ b/cmd/web/handlers_test.go
@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"code.dlmw.ch/dlmw/qv/internal"
 	"encoding/json"
+	"fmt"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"net/http"
 	"testing"
 	"time"
@@ -15,6 +17,11 @@ func TestCreateElection(t *testing.T) {
 	server := newTestServer(t, app.routes())
 	defer server.Close()
 
+	mockElections := app.elections.(*mockElectionModel)
+	mockElections.
+		On("Insert", mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).
+		Return(1, nil)
+
 	path := "/election"
 
 	tests := []struct {
@@ -180,3 +187,32 @@ func TestCreateElection(t *testing.T) {
 		})
 	}
 }
+
+func TestCreateElection_ServerError(t *testing.T) {
+	app := newTestApplication(t)
+	server := newTestServer(t, app.routes())
+	defer server.Close()
+
+	mockElections := app.elections.(*mockElectionModel)
+	mockElections.
+		On("Insert", mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything, mock.Anything).
+		Return(0, fmt.Errorf(""))
+
+	path := "/election"
+	requestBody := api.CreateElectionRequest{
+		Choices:        []string{"宮本武蔵", "伊東一刀斎"},
+		ExpiresAt:      time.Now().Add(24 * time.Hour),
+		AreVotersKnown: false,
+		MaxVoters:      0,
+		Name:           "強",
+		Tokens:         100,
+	}
+	requestBodyJson, err := json.Marshal(requestBody)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	code, _, _ := server.post(t, path, bytes.NewReader(requestBodyJson))
+
+	assert.Equal(t, 500, code)
+}
diff --git a/cmd/web/testutils_test.go b/cmd/web/testutils_test.go
index b5aebb4..d197f10 100644
--- a/cmd/web/testutils_test.go
+++ b/cmd/web/testutils_test.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"code.dlmw.ch/dlmw/qv/internal/models"
+	"github.com/stretchr/testify/mock"
 	"io"
 	"log/slog"
 	"net/http"
@@ -44,10 +45,12 @@ func (ts *testServer) post(t *testing.T, urlPath string, body io.Reader) (int, h
 }
 
 type mockElectionModel struct {
+	mock.Mock
 }
 
 func (e *mockElectionModel) Insert(name string, tokens int, areVotersKnown bool, maxVoters int, choices []string, expiresAt time.Time) (int, error) {
-	return 1, nil
+	args := e.Called(name, tokens, areVotersKnown, maxVoters, choices, expiresAt)
+	return args.Int(0), args.Error(1)
 }
 
 func (e *mockElectionModel) GetById(id int) (*models.Election, error) {
@@ -78,10 +81,12 @@ func (v *mockVoterModel) Exists(voterIdentity string, electionID int) (bool, err
 }
 
 type mockVoteModel struct {
+	mock.Mock
 }
 
 func (v *mockVoteModel) Insert(voterIdentity string, electionId int, choiceText string, tokens int) (int, error) {
-	return 1, nil
+	args := v.Called(voterIdentity, electionId, choiceText, tokens)
+	return args.Int(0), args.Error(1)
 }
 
 func (v *mockVoteModel) Exists(voterIdentity string, electionID int) (bool, error) {
diff --git a/go.mod b/go.mod
index 6b0dfbe..25643b3 100644
--- a/go.mod
+++ b/go.mod
@@ -29,6 +29,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
diff --git a/go.sum b/go.sum
index d456a44..3bfa790 100644
--- a/go.sum
+++ b/go.sum
@@ -74,6 +74,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 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/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=