From 134694473ff6a420b4d6845dfa826d76b70da279 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
Date: Mon, 25 Sep 2017 11:31:22 +0200
Subject: [PATCH] Use specific font by ImageMagick
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Tests use ImageMagick to draw labels into pictures. This does not work
with ImageMagick-6.9.9.13-1.fc28.x86_64 and
rw-base35-fonts-20170801-1.fc28:

$ convert label:"The quick brown fox" test.png
convert: unable to read font `(null)' @ error/annotate.c/RenderFreetype/1362.
convert: no images defined `test.png' @ error/convert.c/ConvertImageCommand/3258.

This patch specifies DejaVu-Sans font explicitly.

<https://bugzilla.redhat.com/show_bug.cgi?id=1494563>

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 t/1122_save_pdf_with_hocr.t      | 2 +-
 t/113_save_pdf_with_downsample.t | 2 +-
 t/134_save_tiff_alpha.t          | 4 ++--
 t/1621_import_pdf.t              | 4 ++--
 t/1625_import_pdf_bw.t           | 4 ++--
 t/31_ocropus.t                   | 6 +++---
 t/32_ocropus_in_thread.t         | 2 +-
 t/33_cancel_ocropus.t            | 2 +-
 t/351_unpaper.t                  | 2 +-
 t/352_unpaper.t                  | 2 +-
 t/353_cancel_unpaper.t           | 4 ++--
 t/354_unpaper_with_error.t       | 2 +-
 t/355_unpaper2.t                 | 4 ++--
 t/356_unpaper_corrupt_image.t    | 2 +-
 t/357_unpaper_rtl.t              | 4 ++--
 t/358_unpaper_with_warning.t     | 2 +-
 t/411_tesseract.t                | 6 +++---
 t/412_tesseract_in_thread.t      | 2 +-
 t/413_cancel_tesseract.t         | 2 +-
 t/414_tesseract_with_error.t     | 2 +-
 t/421_cuneiform.t                | 6 +++---
 t/422_cuneiform_in_thread.t      | 2 +-
 t/423_cancel_cuneiform.t         | 2 +-
 t/424_cuneiform_with_error.t     | 2 +-
 t/431_gocr.t                     | 2 +-
 t/432_gocr.t                     | 2 +-
 t/433_cancel_gocr.t              | 2 +-
 t/434_gocr_with_error.t          | 2 +-
 t/51_process_chain.t             | 2 +-
 t/53_process_chain.t             | 2 +-
 30 files changed, 42 insertions(+), 42 deletions(-)

diff --git a/t/1122_save_pdf_with_hocr.t b/t/1122_save_pdf_with_hocr.t
index b38bd74..ba9dfc9 100644
--- a/t/1122_save_pdf_with_hocr.t
+++ b/t/1122_save_pdf_with_hocr.t
@@ -18,7 +18,7 @@ Gscan2pdf::Document->setup($logger);
 
 # Create test image
 system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" -border 20x10 test.png'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" -border 20x10 test.png'
 );
 my $info = `identify test.png`;
 my ( $width, $height );
diff --git a/t/113_save_pdf_with_downsample.t b/t/113_save_pdf_with_downsample.t
index 505d691..3a5c80f 100644
--- a/t/113_save_pdf_with_downsample.t
+++ b/t/113_save_pdf_with_downsample.t
@@ -18,7 +18,7 @@ Gscan2pdf::Document->setup($logger);
 
 # Create test image
 system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
 );
 
 my $slist = Gscan2pdf::Document->new;
diff --git a/t/134_save_tiff_alpha.t b/t/134_save_tiff_alpha.t
index e913797..c5cde13 100644
--- a/t/134_save_tiff_alpha.t
+++ b/t/134_save_tiff_alpha.t
@@ -17,7 +17,7 @@ Gscan2pdf::Document->setup($logger);
 
 # Create test image
 system(
-'convert -fill lightblue -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" test.png'
+'convert -fill lightblue -font DejaVu-Sans -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" test.png'
 );
 
 my $slist = Gscan2pdf::Document->new;
@@ -43,7 +43,7 @@ Gtk3->main;
 
 like(
     `identify test.tif`,
-    qr/test.tif TIFF 4\d\dx\d\d 4\d\dx\d\d\+0\+0 16-bit sRGB/,
+    qr/test.tif TIFF \d\d\dx\d\d \d\d\dx\d\d\+0\+0 16-bit sRGB/,
     'valid TIFF created'
 );
 
diff --git a/t/1621_import_pdf.t b/t/1621_import_pdf.t
index 0138004..e9eb4fe 100644
--- a/t/1621_import_pdf.t
+++ b/t/1621_import_pdf.t
@@ -20,7 +20,7 @@ Gscan2pdf::Document->setup($logger);
 
 # Create b&w test image
 system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -units PixelsPerInch -density 300 label:"The quick brown fox" test.png'
 );
 
 # Add text layer with tesseract
@@ -29,7 +29,7 @@ if ($tess_installed) {
 }
 else {
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" test.pdf'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pdf'
     );
 }
 
diff --git a/t/1625_import_pdf_bw.t b/t/1625_import_pdf_bw.t
index 926f5ec..2db6044 100644
--- a/t/1625_import_pdf_bw.t
+++ b/t/1625_import_pdf_bw.t
@@ -18,10 +18,10 @@ Gscan2pdf::Document->setup($logger);
 
 # Create test image
 system(
-'convert +matte -depth 1 -colorspace Gray -type Bilevel -pointsize 12 -density 300 label:"The quick brown fox" test.pdf'
+'convert +matte -depth 1 -colorspace Gray -type Bilevel -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pdf'
 );
 system(
-'convert +matte -depth 1 -colorspace Gray -type Bilevel -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -colorspace Gray -type Bilevel -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
 );
 my $old = `identify -format '%m %G %g %z-bit %r' test.png`;
 
diff --git a/t/31_ocropus.t b/t/31_ocropus.t
index fad08a8..81a1b6f 100644
--- a/t/31_ocropus.t
+++ b/t/31_ocropus.t
@@ -19,7 +19,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $got = Gscan2pdf::Ocropus->hocr(
@@ -32,7 +32,7 @@ SKIP: {
 
     # Create colour test image
     system(
-'convert -fill lightblue -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert -fill lightblue -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     $got = Gscan2pdf::Ocropus->hocr(
@@ -55,7 +55,7 @@ SKIP: {
 
     # Create test image
     system(
-"convert +matte -depth 1 -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
+"convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
     );
 
     $got = Gscan2pdf::Ocropus->hocr(
diff --git a/t/32_ocropus_in_thread.t b/t/32_ocropus_in_thread.t
index 30406ef..f9fa9fb 100644
--- a/t/32_ocropus_in_thread.t
+++ b/t/32_ocropus_in_thread.t
@@ -23,7 +23,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/33_cancel_ocropus.t b/t/33_cancel_ocropus.t
index eb39af1..f1c352d 100644
--- a/t/33_cancel_ocropus.t
+++ b/t/33_cancel_ocropus.t
@@ -20,7 +20,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/351_unpaper.t b/t/351_unpaper.t
index 3ac8c3d..0ebc0f8 100644
--- a/t/351_unpaper.t
+++ b/t/351_unpaper.t
@@ -45,7 +45,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
+'convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/352_unpaper.t b/t/352_unpaper.t
index 83e1e7a..44bb98b 100644
--- a/t/352_unpaper.t
+++ b/t/352_unpaper.t
@@ -45,7 +45,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert -size 2550x3507 +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
+'convert -size 2550x3507 +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/353_cancel_unpaper.t b/t/353_cancel_unpaper.t
index 5d1c271..3199a0e 100644
--- a/t/353_cancel_unpaper.t
+++ b/t/353_cancel_unpaper.t
@@ -24,10 +24,10 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
     );
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
     );
     system('convert -size 100x100 xc:black black.pnm');
     system('convert 1.pnm black.pnm 2.pnm +append test.pnm');
diff --git a/t/354_unpaper_with_error.t b/t/354_unpaper_with_error.t
index 0247b20..f0052a7 100644
--- a/t/354_unpaper_with_error.t
+++ b/t/354_unpaper_with_error.t
@@ -45,7 +45,7 @@ SKIP: {
     # Create test image
     my $filename = 'test.png';
     system(
-"convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:'The quick brown fox' $filename"
+"convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:'The quick brown fox' $filename"
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/355_unpaper2.t b/t/355_unpaper2.t
index 20ea40a..2af39f9 100644
--- a/t/355_unpaper2.t
+++ b/t/355_unpaper2.t
@@ -22,10 +22,10 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
     );
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
     );
     system('convert -size 100x100 xc:black black.pnm');
     system('convert 1.pnm black.pnm 2.pnm +append test.pnm');
diff --git a/t/356_unpaper_corrupt_image.t b/t/356_unpaper_corrupt_image.t
index 09257fb..0cb77b7 100644
--- a/t/356_unpaper_corrupt_image.t
+++ b/t/356_unpaper_corrupt_image.t
@@ -51,7 +51,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
+'convert -size 2100x2970 +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
     );
 
     $slist->import_files(
diff --git a/t/357_unpaper_rtl.t b/t/357_unpaper_rtl.t
index 7b05361..b0fb8b8 100644
--- a/t/357_unpaper_rtl.t
+++ b/t/357_unpaper_rtl.t
@@ -23,10 +23,10 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" 1.pnm'
     );
     system(
-'convert +matte -depth 1 -border 2x2 -bordercolor black -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
+'convert +matte -depth 1 -border 2x2 -bordercolor black -font DejaVu-Sans -pointsize 12 -density 300 label:"The slower lazy dog" 2.pnm'
     );
     system('convert -size 100x100 xc:black black.pnm');
     system('convert 1.pnm black.pnm 2.pnm +append test.pnm');
diff --git a/t/358_unpaper_with_warning.t b/t/358_unpaper_with_warning.t
index d313f28..f28a02f 100644
--- a/t/358_unpaper_with_warning.t
+++ b/t/358_unpaper_with_warning.t
@@ -25,7 +25,7 @@ SKIP: {
     # Create test image
     my $filename = 'test.png';
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" -rotate 20 '
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" -rotate 20 '
           . $filename );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/411_tesseract.t b/t/411_tesseract.t
index f222006..bb91116 100644
--- a/t/411_tesseract.t
+++ b/t/411_tesseract.t
@@ -81,7 +81,7 @@ SKIP: {
 
     # Create b&w test image
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my ( $got, $messages ) = Gscan2pdf::Tesseract->hocr(
@@ -97,7 +97,7 @@ SKIP: {
 
     # Create colour test image
     system(
-'convert -fill lightblue -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert -fill lightblue -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     ( $got, $messages ) = Gscan2pdf::Tesseract->hocr(
@@ -118,7 +118,7 @@ SKIP: {
 
     # Create b&w test image
     system(
-"convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
+"convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
     );
 
     ( $got, $messages ) = Gscan2pdf::Tesseract->hocr(
diff --git a/t/412_tesseract_in_thread.t b/t/412_tesseract_in_thread.t
index ba6efe9..db56ac8 100644
--- a/t/412_tesseract_in_thread.t
+++ b/t/412_tesseract_in_thread.t
@@ -23,7 +23,7 @@ SKIP: {
     # Deliberately not setting -units to provoke
     # "Invalid resolution 0 dpi. Using 70 instead." warning from tesseract
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/413_cancel_tesseract.t b/t/413_cancel_tesseract.t
index 8bf7c30..0ee53f2 100644
--- a/t/413_cancel_tesseract.t
+++ b/t/413_cancel_tesseract.t
@@ -22,7 +22,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" test.tif'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.tif'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/414_tesseract_with_error.t b/t/414_tesseract_with_error.t
index 788515e..ec488e8 100644
--- a/t/414_tesseract_with_error.t
+++ b/t/414_tesseract_with_error.t
@@ -23,7 +23,7 @@ SKIP: {
     # Create test image
     my $filename = 'test.png';
     system(
-"convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:'The quick brown fox' $filename"
+"convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:'The quick brown fox' $filename"
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/421_cuneiform.t b/t/421_cuneiform.t
index 51cff00..38ec42a 100644
--- a/t/421_cuneiform.t
+++ b/t/421_cuneiform.t
@@ -19,7 +19,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $got = Gscan2pdf::Cuneiform->hocr(
@@ -32,7 +32,7 @@ SKIP: {
 
     # Create colour test image
     system(
-'convert -fill lightblue -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert -fill lightblue -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     $got = Gscan2pdf::Cuneiform->hocr(
@@ -50,7 +50,7 @@ SKIP: {
 
     # Create test image
     system(
-"convert +matte -depth 1 -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
+"convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:'öÖäÄüÜß' test.png"
     );
 
     $got = Gscan2pdf::Cuneiform->hocr(
diff --git a/t/422_cuneiform_in_thread.t b/t/422_cuneiform_in_thread.t
index 5f73385..2ff0fd5 100644
--- a/t/422_cuneiform_in_thread.t
+++ b/t/422_cuneiform_in_thread.t
@@ -24,7 +24,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/423_cancel_cuneiform.t b/t/423_cancel_cuneiform.t
index 7da3d85..ae8e5c5 100644
--- a/t/423_cancel_cuneiform.t
+++ b/t/423_cancel_cuneiform.t
@@ -23,7 +23,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.png'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.png'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/424_cuneiform_with_error.t b/t/424_cuneiform_with_error.t
index 354be31..62875dd 100644
--- a/t/424_cuneiform_with_error.t
+++ b/t/424_cuneiform_with_error.t
@@ -23,7 +23,7 @@ SKIP: {
     # Create test image
     my $filename = 'test.png';
     system(
-"convert +matte -depth 1 -pointsize 12 -density 300 label:'The quick brown fox' $filename"
+"convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:'The quick brown fox' $filename"
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/431_gocr.t b/t/431_gocr.t
index a4a4603..0ec6b42 100644
--- a/t/431_gocr.t
+++ b/t/431_gocr.t
@@ -21,7 +21,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/432_gocr.t b/t/432_gocr.t
index 0ae8cc9..dd577b1 100644
--- a/t/432_gocr.t
+++ b/t/432_gocr.t
@@ -22,7 +22,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"öÖäÄüÜß" test.pnm'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"öÖäÄüÜß" test.pnm'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/433_cancel_gocr.t b/t/433_cancel_gocr.t
index 3a66fb8..f443463 100644
--- a/t/433_cancel_gocr.t
+++ b/t/433_cancel_gocr.t
@@ -21,7 +21,7 @@ SKIP: {
 
     # Create test image
     system(
-'convert +matte -depth 1 -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
+'convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" test.pnm'
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/434_gocr_with_error.t b/t/434_gocr_with_error.t
index 7bd8a7d..05e46b6 100644
--- a/t/434_gocr_with_error.t
+++ b/t/434_gocr_with_error.t
@@ -22,7 +22,7 @@ SKIP: {
     # Create test image
     my $filename = 'test.pnm';
     system(
-"convert +matte -depth 1 -pointsize 12 -density 300 label:'The quick brown fox' $filename"
+"convert +matte -depth 1 -font DejaVu-Sans -pointsize 12 -density 300 label:'The quick brown fox' $filename"
     );
 
     my $slist = Gscan2pdf::Document->new;
diff --git a/t/51_process_chain.t b/t/51_process_chain.t
index 067c803..6f97b8a 100644
--- a/t/51_process_chain.t
+++ b/t/51_process_chain.t
@@ -33,7 +33,7 @@ SKIP: {
 
     # Create b&w test image
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" -rotate -90 test.pnm'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" -rotate -90 test.pnm'
     );
 
     $slist->import_scan(
diff --git a/t/53_process_chain.t b/t/53_process_chain.t
index 84fc93b..bc09269 100644
--- a/t/53_process_chain.t
+++ b/t/53_process_chain.t
@@ -33,7 +33,7 @@ SKIP: {
 
     # Create b&w test image
     system(
-'convert +matte -depth 1 -colorspace Gray -pointsize 12 -density 300 label:"The quick brown fox" -rotate -90 test.pnm'
+'convert +matte -depth 1 -colorspace Gray -font DejaVu-Sans -pointsize 12 -density 300 label:"The quick brown fox" -rotate -90 test.pnm'
     );
 
     $slist->import_scan(
-- 
2.17.2