diff --git a/main_test.go b/main_test.go
index 4ab6657..3d8470d 100644
--- a/main_test.go
+++ b/main_test.go
@@ -7,27 +7,23 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/benoitkugler/go-weasyprint/pdf/test"
 	"github.com/benoitkugler/pdf/reader/file"
-	fc "github.com/benoitkugler/textprocessing/fontconfig"
-	"github.com/benoitkugler/textprocessing/pango/fcfonts"
 	"github.com/benoitkugler/webrender/logger"
 	"github.com/benoitkugler/webrender/text"
 	"github.com/benoitkugler/webrender/utils"
 )
 
-// see pdf/test/draw_test.go
-const fontmapCache = "pdf/test/cache.fc"
-
 var fontconfig text.FontConfiguration
 
 func init() {
 	logger.ProgressLogger.SetOutput(io.Discard)
 
-	fs, err := fc.LoadFontsetFile(fontmapCache)
+	var err error
+	fontconfig, err = test.LoadTestFontConfig("pdf/test/")
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalf("creating font configuration: %s", err)
 	}
-	fontconfig = text.NewFontConfigurationPango(fcfonts.NewFontMap(fc.Standard.Copy(), fs))
 }
 
 func tempFile(s string) string {
diff --git a/pdf/draw_test.go b/pdf/draw_test.go
index 97b38df..643b29c 100644
--- a/pdf/draw_test.go
+++ b/pdf/draw_test.go
@@ -15,9 +15,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/benoitkugler/go-weasyprint/pdf/test"
 	"github.com/benoitkugler/pdf/model"
-	fc "github.com/benoitkugler/textprocessing/fontconfig"
-	"github.com/benoitkugler/textprocessing/pango/fcfonts"
 	"github.com/benoitkugler/webrender/backend"
 	"github.com/benoitkugler/webrender/html/document"
 	"github.com/benoitkugler/webrender/html/tree"
@@ -27,8 +26,6 @@ import (
 	tu "github.com/benoitkugler/webrender/utils/testutils"
 )
 
-const fontmapCache = "test/cache.fc"
-
 var fontconfig text.FontConfiguration
 
 var joker = color.RGBA{}
@@ -53,18 +50,11 @@ var colorByName = map[byte]color.RGBA{
 func init() {
 	logger.ProgressLogger.SetOutput(io.Discard)
 
-	// this command has to run once
-	// fmt.Println("Scanning fonts...")
-	// _, err := fc.ScanAndCache(fontmapCache)
-	// if err != nil {
-	// 	log.Fatal(err)
-	// }
-
-	fs, err := fc.LoadFontsetFile(fontmapCache)
+	var err error
+	fontconfig, err = test.LoadTestFontConfig("test/")
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalf("creating font configuration: %s", err)
 	}
-	fontconfig = text.NewFontConfigurationPango(fcfonts.NewFontMap(fc.Standard.Copy(), fs))
 }
 
 // convert a PDF file to an image using Ghostscript, and extract the pixels,
diff --git a/pdf/test/utils.go b/pdf/test/utils.go
new file mode 100644
index 0000000..c268e06
--- /dev/null
+++ b/pdf/test/utils.go
@@ -0,0 +1,36 @@
+package test
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	fc "github.com/benoitkugler/textprocessing/fontconfig"
+	"github.com/benoitkugler/textprocessing/pango/fcfonts"
+
+	"github.com/benoitkugler/webrender/text"
+)
+
+// LoadTestFontConfig loads the font index in [cacheDir],
+// creating it if needed.
+func LoadTestFontConfig(cacheDir string) (text.FontConfiguration, error) {
+	const cacheFile = "cache.fc"
+	cachePath := filepath.Join(cacheDir, cacheFile)
+
+	_, err := os.Stat(cachePath)
+	if err != nil {
+		// build the index
+		fmt.Println("Scanning fonts...")
+		_, err := fc.ScanAndCache(cachePath)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	fs, err := fc.LoadFontsetFile(cachePath)
+	if err != nil {
+		return nil, err
+	}
+
+	return text.NewFontConfigurationPango(fcfonts.NewFontMap(fc.Standard.Copy(), fs)), nil
+}