diff --git a/store/postgres_test.go b/store/postgres_test.go
index 161eb1a..16e798e 100644
--- a/store/postgres_test.go
+++ b/store/postgres_test.go
@@ -121,6 +121,34 @@ func TestInsertPlanErr(t *testing.T) {
 
 }
 
+func TestInsertPlanCommitErr(t *testing.T) {
+	// setup
+	assert := assert.New(t)
+
+	str, mock := getDbMock(t)
+	planDate, _ := time.Parse("2006-01-02", "2021-01-01")
+	plan := &models.Plan{PlanDate: planDate}
+
+	idToUse := 8
+
+	rows := sqlmock.NewRows([]string{"plan_id"}).AddRow(idToUse)
+
+	mock.ExpectBegin()
+	mock.ExpectQuery("^INSERT INTO plans \\(plan_date\\) VALUES \\(\\$1\\) RETURNING plan_id$").
+		WithArgs(planDate).
+		WillReturnRows(rows)
+	mock.ExpectCommit().WillReturnError(fmt.Errorf("another error example"))
+
+	// function under test
+	_, err := str.InsertPlan(plan)
+	// check results
+	assert.NotNil(err)
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("unfulfilled expectations: %s", err)
+	}
+
+}
+
 func TestErrPlanByID(t *testing.T) {
 	assert := assert.New(t)