diff --git a/driver.go b/driver.go
index 5faa25c..bfdf92f 100644
--- a/driver.go
+++ b/driver.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
+	"os"
 	"path"
 	"testing"
 
@@ -35,7 +36,12 @@ func NewTestDriver(t *testing.T, optionalP ...string) Driver {
 func NewDriver(ctx context.Context, conn string) (Driver, error) {
 	engine := "sqlite"
 	if conn == "" {
-		conn = ":memory:"
+		f, err := os.CreateTemp(os.TempDir(), "spoc-bot-vr-undef-*.db")
+		if err != nil {
+			return Driver{}, err
+		}
+		f.Close()
+		conn = f.Name()
 	} else {
 		if u, err := url.Parse(conn); err != nil {
 			return Driver{}, err