diff --git a/backend/qr.c b/backend/qr.c
index 68bc633a..4d8840f7 100644
--- a/backend/qr.c
+++ b/backend/qr.c
@@ -1069,6 +1069,7 @@ static int evaluate(unsigned char *local, const int size) {
     }
 
     /* Horizontal */
+    dark_mods = 0; /* Count dark mods simultaneously (see Test 4 below) */
     for (y = 0; y < size; y++) {
         r = y * size;
         block = 0;
@@ -1083,6 +1084,9 @@ static int evaluate(unsigned char *local, const int size) {
                 block = 1;
                 state = local[r + x];
             }
+            if (state) {
+                dark_mods++;
+            }
         }
         if (block >= 5) {
             result += block - 2;
@@ -1097,7 +1101,6 @@ static int evaluate(unsigned char *local, const int size) {
 #endif
 
     /* Test 2: Block of modules in same color */
-    dark_mods = 0; /* Count dark mods simultaneously (see Test 4 below) */
     for (x = 0; x < size - 1; x++) {
         for (y = 0; y < size - 1; y++) {
             k = local[(y * size) + x];
@@ -1106,9 +1109,6 @@ static int evaluate(unsigned char *local, const int size) {
                     (k == local[((y + 1) * size) + (x + 1)])) {
                 result += 3;
             }
-            if (k) {
-                dark_mods++;
-            }
         }
     }
 
@@ -1215,11 +1215,7 @@ static int evaluate(unsigned char *local, const int size) {
 
     /* Test 4: Proportion of dark modules in entire symbol */
     percentage = (100.0 * dark_mods) / (size * size);
-    if (percentage < 50.0) {
-        k = (int) ceil(((100.0 - percentage) - 50.0) / 5.0);
-    } else {
-        k = (int) ceil((percentage - 50.0) / 5.0);
-    }
+    k = (int) (fabs(percentage - 50.0) / 5.0);
 
     result += 10 * k;
 
diff --git a/backend/tests/data/print/bmp/qr_v1_m.bmp b/backend/tests/data/print/bmp/qr_v1_m.bmp
index 8a43eacf..c5da1ff5 100644
Binary files a/backend/tests/data/print/bmp/qr_v1_m.bmp and b/backend/tests/data/print/bmp/qr_v1_m.bmp differ
diff --git a/backend/tests/data/print/emf/qr_v1_m.emf b/backend/tests/data/print/emf/qr_v1_m.emf
index eefe3b04..069c0641 100644
Binary files a/backend/tests/data/print/emf/qr_v1_m.emf and b/backend/tests/data/print/emf/qr_v1_m.emf differ
diff --git a/backend/tests/data/print/eps/qr_v1_m.eps b/backend/tests/data/print/eps/qr_v1_m.eps
index 5c138d3e..07313119 100644
--- a/backend/tests/data/print/eps/qr_v1_m.eps
+++ b/backend/tests/data/print/eps/qr_v1_m.eps
@@ -17,9 +17,9 @@ TE
 0.00 0.00 0.00 setrgbcolor
 2.00 40.00 TB 0.00 14.00 TR
 TE
-2.00 40.00 TB 20.00 2.00 TR
+2.00 40.00 TB 16.00 2.00 TR
 TE
-2.00 40.00 TB 24.00 2.00 TR
+2.00 40.00 TB 22.00 4.00 TR
 TE
 2.00 40.00 TB 28.00 14.00 TR
 TE
@@ -27,147 +27,147 @@ TE
 TE
 10.00 30.00 TB 12.00 2.00 TR
 TE
+2.00 38.00 TB 18.00 2.00 TR
+TE
+2.00 38.00 TB 24.00 2.00 TR
+TE
 10.00 30.00 TB 28.00 2.00 TR
 TE
 10.00 30.00 TB 40.00 2.00 TR
 TE
 6.00 32.00 TB 4.00 6.00 TR
 TE
-10.00 28.00 TB 16.00 2.00 TR
+2.00 36.00 TB 16.00 2.00 TR
 TE
-2.00 36.00 TB 20.00 2.00 TR
+2.00 36.00 TB 22.00 2.00 TR
 TE
 6.00 32.00 TB 32.00 6.00 TR
 TE
-2.00 34.00 TB 22.00 2.00 TR
+2.00 34.00 TB 18.00 2.00 TR
 TE
-2.00 32.00 TB 20.00 2.00 TR
+6.00 30.00 TB 22.00 4.00 TR
 TE
-2.00 32.00 TB 24.00 2.00 TR
-TE
-2.00 30.00 TB 22.00 2.00 TR
+2.00 30.00 TB 16.00 4.00 TR
 TE
 2.00 28.00 TB 0.00 14.00 TR
 TE
+2.00 28.00 TB 16.00 2.00 TR
+TE
 2.00 28.00 TB 20.00 2.00 TR
 TE
-2.00 28.00 TB 24.00 2.00 TR
+4.00 26.00 TB 24.00 2.00 TR
 TE
 2.00 28.00 TB 28.00 14.00 TR
 TE
-2.00 26.00 TB 16.00 4.00 TR
+4.00 22.00 TB 0.00 2.00 TR
 TE
-2.00 24.00 TB 0.00 2.00 TR
+4.00 22.00 TB 4.00 2.00 TR
 TE
-2.00 24.00 TB 4.00 10.00 TR
+2.00 24.00 TB 12.00 4.00 TR
 TE
-2.00 24.00 TB 22.00 2.00 TR
+2.00 24.00 TB 20.00 2.00 TR
 TE
-2.00 24.00 TB 28.00 10.00 TR
+2.00 24.00 TB 30.00 2.00 TR
 TE
-2.00 22.00 TB 4.00 6.00 TR
+2.00 24.00 TB 36.00 2.00 TR
 TE
-2.00 22.00 TB 16.00 2.00 TR
+2.00 24.00 TB 40.00 2.00 TR
 TE
-2.00 22.00 TB 20.00 10.00 TR
+4.00 20.00 TB 8.00 2.00 TR
 TE
-2.00 22.00 TB 34.00 8.00 TR
+2.00 22.00 TB 16.00 8.00 TR
 TE
-2.00 20.00 TB 0.00 2.00 TR
+2.00 22.00 TB 26.00 6.00 TR
 TE
-2.00 20.00 TB 10.00 6.00 TR
+2.00 22.00 TB 34.00 2.00 TR
 TE
-2.00 20.00 TB 18.00 4.00 TR
+2.00 22.00 TB 38.00 4.00 TR
 TE
-2.00 20.00 TB 24.00 2.00 TR
+2.00 20.00 TB 0.00 6.00 TR
 TE
-2.00 20.00 TB 28.00 4.00 TR
+2.00 20.00 TB 12.00 2.00 TR
 TE
-2.00 20.00 TB 34.00 2.00 TR
+2.00 20.00 TB 16.00 4.00 TR
 TE
-2.00 20.00 TB 40.00 2.00 TR
+2.00 20.00 TB 22.00 6.00 TR
 TE
-2.00 18.00 TB 2.00 2.00 TR
+2.00 20.00 TB 30.00 4.00 TR
 TE
-2.00 18.00 TB 8.00 4.00 TR
+2.00 20.00 TB 38.00 2.00 TR
+TE
+4.00 16.00 TB 0.00 4.00 TR
+TE
+2.00 18.00 TB 6.00 6.00 TR
 TE
 2.00 18.00 TB 14.00 2.00 TR
 TE
-2.00 18.00 TB 22.00 8.00 TR
+4.00 16.00 TB 18.00 2.00 TR
 TE
-2.00 18.00 TB 36.00 6.00 TR
+2.00 18.00 TB 22.00 2.00 TR
 TE
-2.00 16.00 TB 0.00 2.00 TR
+2.00 18.00 TB 26.00 6.00 TR
 TE
-2.00 16.00 TB 4.00 4.00 TR
+2.00 18.00 TB 38.00 4.00 TR
 TE
-2.00 16.00 TB 12.00 2.00 TR
+2.00 16.00 TB 6.00 10.00 TR
 TE
-4.00 14.00 TB 16.00 6.00 TR
+2.00 16.00 TB 22.00 14.00 TR
 TE
-4.00 14.00 TB 24.00 2.00 TR
+2.00 16.00 TB 40.00 2.00 TR
 TE
-4.00 14.00 TB 30.00 2.00 TR
+2.00 14.00 TB 16.00 2.00 TR
 TE
-2.00 16.00 TB 38.00 2.00 TR
-TE
-2.00 14.00 TB 36.00 2.00 TR
+2.00 14.00 TB 20.00 2.00 TR
 TE
 2.00 12.00 TB 0.00 14.00 TR
 TE
-2.00 12.00 TB 18.00 2.00 TR
+2.00 12.00 TB 16.00 6.00 TR
 TE
-2.00 12.00 TB 22.00 2.00 TR
+2.00 12.00 TB 28.00 2.00 TR
 TE
-2.00 12.00 TB 26.00 2.00 TR
-TE
-2.00 12.00 TB 32.00 4.00 TR
-TE
-4.00 10.00 TB 40.00 2.00 TR
+2.00 12.00 TB 38.00 2.00 TR
 TE
 10.00 2.00 TB 0.00 2.00 TR
 TE
 10.00 2.00 TB 12.00 2.00 TR
 TE
-4.00 8.00 TB 16.00 4.00 TR
+2.00 10.00 TB 24.00 2.00 TR
 TE
-2.00 10.00 TB 30.00 4.00 TR
+2.00 10.00 TB 32.00 2.00 TR
 TE
-2.00 10.00 TB 36.00 2.00 TR
+2.00 10.00 TB 40.00 2.00 TR
 TE
 6.00 4.00 TB 4.00 6.00 TR
 TE
-2.00 8.00 TB 22.00 2.00 TR
+2.00 8.00 TB 18.00 4.00 TR
 TE
-2.00 8.00 TB 26.00 2.00 TR
+2.00 8.00 TB 28.00 2.00 TR
 TE
-2.00 8.00 TB 32.00 6.00 TR
+2.00 8.00 TB 36.00 6.00 TR
 TE
-2.00 6.00 TB 16.00 2.00 TR
+2.00 6.00 TB 18.00 6.00 TR
 TE
-2.00 6.00 TB 20.00 12.00 TR
+2.00 6.00 TB 26.00 4.00 TR
 TE
-4.00 4.00 TB 34.00 4.00 TR
+2.00 6.00 TB 34.00 2.00 TR
 TE
-2.00 4.00 TB 16.00 6.00 TR
+2.00 4.00 TB 16.00 4.00 TR
 TE
-2.00 4.00 TB 24.00 2.00 TR
+2.00 4.00 TB 22.00 6.00 TR
 TE
-2.00 4.00 TB 28.00 4.00 TR
+2.00 4.00 TB 30.00 4.00 TR
 TE
-2.00 2.00 TB 18.00 2.00 TR
+2.00 4.00 TB 36.00 6.00 TR
 TE
-2.00 2.00 TB 22.00 10.00 TR
+2.00 2.00 TB 22.00 2.00 TR
 TE
-2.00 2.00 TB 36.00 4.00 TR
+2.00 2.00 TB 26.00 4.00 TR
+TE
+2.00 2.00 TB 38.00 2.00 TR
 TE
 2.00 0.00 TB 0.00 14.00 TR
 TE
 2.00 0.00 TB 16.00 2.00 TR
 TE
-2.00 0.00 TB 24.00 2.00 TR
-TE
-2.00 0.00 TB 30.00 2.00 TR
-TE
-2.00 0.00 TB 36.00 2.00 TR
+2.00 0.00 TB 20.00 22.00 TR
 TE
diff --git a/backend/tests/data/print/gif/qr_v1_m.gif b/backend/tests/data/print/gif/qr_v1_m.gif
index e8385883..6e61e093 100644
Binary files a/backend/tests/data/print/gif/qr_v1_m.gif and b/backend/tests/data/print/gif/qr_v1_m.gif differ
diff --git a/backend/tests/data/print/pcx/qr_v1_m.pcx b/backend/tests/data/print/pcx/qr_v1_m.pcx
index ba1f2d12..2da2ec68 100644
Binary files a/backend/tests/data/print/pcx/qr_v1_m.pcx and b/backend/tests/data/print/pcx/qr_v1_m.pcx differ
diff --git a/backend/tests/data/print/png/qr_v1_m.png b/backend/tests/data/print/png/qr_v1_m.png
index c150041b..aa017053 100644
Binary files a/backend/tests/data/print/png/qr_v1_m.png and b/backend/tests/data/print/png/qr_v1_m.png differ
diff --git a/backend/tests/data/print/svg/qr_v1_m.svg b/backend/tests/data/print/svg/qr_v1_m.svg
index 79c56a1f..653abe14 100644
--- a/backend/tests/data/print/svg/qr_v1_m.svg
+++ b/backend/tests/data/print/svg/qr_v1_m.svg
@@ -9,82 +9,82 @@
    <g id="barcode" fill="#000000">
       <rect x="0" y="0" width="42" height="42" fill="#FFFFFF" />
       <rect x="0.00" y="0.00" width="14.00" height="2.00" />
-      <rect x="20.00" y="0.00" width="2.00" height="2.00" />
-      <rect x="24.00" y="0.00" width="2.00" height="2.00" />
+      <rect x="16.00" y="0.00" width="2.00" height="2.00" />
+      <rect x="22.00" y="0.00" width="4.00" height="2.00" />
       <rect x="28.00" y="0.00" width="14.00" height="2.00" />
       <rect x="0.00" y="2.00" width="2.00" height="10.00" />
       <rect x="12.00" y="2.00" width="2.00" height="10.00" />
+      <rect x="18.00" y="2.00" width="2.00" height="2.00" />
+      <rect x="24.00" y="2.00" width="2.00" height="2.00" />
       <rect x="28.00" y="2.00" width="2.00" height="10.00" />
       <rect x="40.00" y="2.00" width="2.00" height="10.00" />
       <rect x="4.00" y="4.00" width="6.00" height="6.00" />
-      <rect x="16.00" y="4.00" width="2.00" height="10.00" />
-      <rect x="20.00" y="4.00" width="2.00" height="2.00" />
+      <rect x="16.00" y="4.00" width="2.00" height="2.00" />
+      <rect x="22.00" y="4.00" width="2.00" height="2.00" />
       <rect x="32.00" y="4.00" width="6.00" height="6.00" />
-      <rect x="22.00" y="6.00" width="2.00" height="2.00" />
-      <rect x="20.00" y="8.00" width="2.00" height="2.00" />
-      <rect x="24.00" y="8.00" width="2.00" height="2.00" />
-      <rect x="22.00" y="10.00" width="2.00" height="2.00" />
+      <rect x="18.00" y="6.00" width="2.00" height="2.00" />
+      <rect x="22.00" y="6.00" width="4.00" height="6.00" />
+      <rect x="16.00" y="10.00" width="4.00" height="2.00" />
       <rect x="0.00" y="12.00" width="14.00" height="2.00" />
+      <rect x="16.00" y="12.00" width="2.00" height="2.00" />
       <rect x="20.00" y="12.00" width="2.00" height="2.00" />
-      <rect x="24.00" y="12.00" width="2.00" height="2.00" />
+      <rect x="24.00" y="12.00" width="2.00" height="4.00" />
       <rect x="28.00" y="12.00" width="14.00" height="2.00" />
-      <rect x="16.00" y="14.00" width="4.00" height="2.00" />
-      <rect x="0.00" y="16.00" width="2.00" height="2.00" />
-      <rect x="4.00" y="16.00" width="10.00" height="2.00" />
-      <rect x="22.00" y="16.00" width="2.00" height="2.00" />
-      <rect x="28.00" y="16.00" width="10.00" height="2.00" />
-      <rect x="4.00" y="18.00" width="6.00" height="2.00" />
-      <rect x="16.00" y="18.00" width="2.00" height="2.00" />
-      <rect x="20.00" y="18.00" width="10.00" height="2.00" />
-      <rect x="34.00" y="18.00" width="8.00" height="2.00" />
-      <rect x="0.00" y="20.00" width="2.00" height="2.00" />
-      <rect x="10.00" y="20.00" width="6.00" height="2.00" />
-      <rect x="18.00" y="20.00" width="4.00" height="2.00" />
-      <rect x="24.00" y="20.00" width="2.00" height="2.00" />
-      <rect x="28.00" y="20.00" width="4.00" height="2.00" />
-      <rect x="34.00" y="20.00" width="2.00" height="2.00" />
-      <rect x="40.00" y="20.00" width="2.00" height="2.00" />
-      <rect x="2.00" y="22.00" width="2.00" height="2.00" />
-      <rect x="8.00" y="22.00" width="4.00" height="2.00" />
+      <rect x="0.00" y="16.00" width="2.00" height="4.00" />
+      <rect x="4.00" y="16.00" width="2.00" height="4.00" />
+      <rect x="12.00" y="16.00" width="4.00" height="2.00" />
+      <rect x="20.00" y="16.00" width="2.00" height="2.00" />
+      <rect x="30.00" y="16.00" width="2.00" height="2.00" />
+      <rect x="36.00" y="16.00" width="2.00" height="2.00" />
+      <rect x="40.00" y="16.00" width="2.00" height="2.00" />
+      <rect x="8.00" y="18.00" width="2.00" height="4.00" />
+      <rect x="16.00" y="18.00" width="8.00" height="2.00" />
+      <rect x="26.00" y="18.00" width="6.00" height="2.00" />
+      <rect x="34.00" y="18.00" width="2.00" height="2.00" />
+      <rect x="38.00" y="18.00" width="4.00" height="2.00" />
+      <rect x="0.00" y="20.00" width="6.00" height="2.00" />
+      <rect x="12.00" y="20.00" width="2.00" height="2.00" />
+      <rect x="16.00" y="20.00" width="4.00" height="2.00" />
+      <rect x="22.00" y="20.00" width="6.00" height="2.00" />
+      <rect x="30.00" y="20.00" width="4.00" height="2.00" />
+      <rect x="38.00" y="20.00" width="2.00" height="2.00" />
+      <rect x="0.00" y="22.00" width="4.00" height="4.00" />
+      <rect x="6.00" y="22.00" width="6.00" height="2.00" />
       <rect x="14.00" y="22.00" width="2.00" height="2.00" />
-      <rect x="22.00" y="22.00" width="8.00" height="2.00" />
-      <rect x="36.00" y="22.00" width="6.00" height="2.00" />
-      <rect x="0.00" y="24.00" width="2.00" height="2.00" />
-      <rect x="4.00" y="24.00" width="4.00" height="2.00" />
-      <rect x="12.00" y="24.00" width="2.00" height="2.00" />
-      <rect x="16.00" y="24.00" width="6.00" height="4.00" />
-      <rect x="24.00" y="24.00" width="2.00" height="4.00" />
-      <rect x="30.00" y="24.00" width="2.00" height="4.00" />
-      <rect x="38.00" y="24.00" width="2.00" height="2.00" />
-      <rect x="36.00" y="26.00" width="2.00" height="2.00" />
+      <rect x="18.00" y="22.00" width="2.00" height="4.00" />
+      <rect x="22.00" y="22.00" width="2.00" height="2.00" />
+      <rect x="26.00" y="22.00" width="6.00" height="2.00" />
+      <rect x="38.00" y="22.00" width="4.00" height="2.00" />
+      <rect x="6.00" y="24.00" width="10.00" height="2.00" />
+      <rect x="22.00" y="24.00" width="14.00" height="2.00" />
+      <rect x="40.00" y="24.00" width="2.00" height="2.00" />
+      <rect x="16.00" y="26.00" width="2.00" height="2.00" />
+      <rect x="20.00" y="26.00" width="2.00" height="2.00" />
       <rect x="0.00" y="28.00" width="14.00" height="2.00" />
-      <rect x="18.00" y="28.00" width="2.00" height="2.00" />
-      <rect x="22.00" y="28.00" width="2.00" height="2.00" />
-      <rect x="26.00" y="28.00" width="2.00" height="2.00" />
-      <rect x="32.00" y="28.00" width="4.00" height="2.00" />
-      <rect x="40.00" y="28.00" width="2.00" height="4.00" />
+      <rect x="16.00" y="28.00" width="6.00" height="2.00" />
+      <rect x="28.00" y="28.00" width="2.00" height="2.00" />
+      <rect x="38.00" y="28.00" width="2.00" height="2.00" />
       <rect x="0.00" y="30.00" width="2.00" height="10.00" />
       <rect x="12.00" y="30.00" width="2.00" height="10.00" />
-      <rect x="16.00" y="30.00" width="4.00" height="4.00" />
-      <rect x="30.00" y="30.00" width="4.00" height="2.00" />
-      <rect x="36.00" y="30.00" width="2.00" height="2.00" />
+      <rect x="24.00" y="30.00" width="2.00" height="2.00" />
+      <rect x="32.00" y="30.00" width="2.00" height="2.00" />
+      <rect x="40.00" y="30.00" width="2.00" height="2.00" />
       <rect x="4.00" y="32.00" width="6.00" height="6.00" />
-      <rect x="22.00" y="32.00" width="2.00" height="2.00" />
-      <rect x="26.00" y="32.00" width="2.00" height="2.00" />
-      <rect x="32.00" y="32.00" width="6.00" height="2.00" />
-      <rect x="16.00" y="34.00" width="2.00" height="2.00" />
-      <rect x="20.00" y="34.00" width="12.00" height="2.00" />
-      <rect x="34.00" y="34.00" width="4.00" height="4.00" />
-      <rect x="16.00" y="36.00" width="6.00" height="2.00" />
-      <rect x="24.00" y="36.00" width="2.00" height="2.00" />
-      <rect x="28.00" y="36.00" width="4.00" height="2.00" />
-      <rect x="18.00" y="38.00" width="2.00" height="2.00" />
-      <rect x="22.00" y="38.00" width="10.00" height="2.00" />
-      <rect x="36.00" y="38.00" width="4.00" height="2.00" />
+      <rect x="18.00" y="32.00" width="4.00" height="2.00" />
+      <rect x="28.00" y="32.00" width="2.00" height="2.00" />
+      <rect x="36.00" y="32.00" width="6.00" height="2.00" />
+      <rect x="18.00" y="34.00" width="6.00" height="2.00" />
+      <rect x="26.00" y="34.00" width="4.00" height="2.00" />
+      <rect x="34.00" y="34.00" width="2.00" height="2.00" />
+      <rect x="16.00" y="36.00" width="4.00" height="2.00" />
+      <rect x="22.00" y="36.00" width="6.00" height="2.00" />
+      <rect x="30.00" y="36.00" width="4.00" height="2.00" />
+      <rect x="36.00" y="36.00" width="6.00" height="2.00" />
+      <rect x="22.00" y="38.00" width="2.00" height="2.00" />
+      <rect x="26.00" y="38.00" width="4.00" height="2.00" />
+      <rect x="38.00" y="38.00" width="2.00" height="2.00" />
       <rect x="0.00" y="40.00" width="14.00" height="2.00" />
       <rect x="16.00" y="40.00" width="2.00" height="2.00" />
-      <rect x="24.00" y="40.00" width="2.00" height="2.00" />
-      <rect x="30.00" y="40.00" width="2.00" height="2.00" />
-      <rect x="36.00" y="40.00" width="2.00" height="2.00" />
+      <rect x="20.00" y="40.00" width="22.00" height="2.00" />
    </g>
 </svg>
diff --git a/backend/tests/data/print/tif/qr_v1_m.tif b/backend/tests/data/print/tif/qr_v1_m.tif
index 0b21536e..6ebd18e5 100644
Binary files a/backend/tests/data/print/tif/qr_v1_m.tif and b/backend/tests/data/print/tif/qr_v1_m.tif differ
diff --git a/backend/tests/data/print/txt/qr_v1_m.txt b/backend/tests/data/print/txt/qr_v1_m.txt
index d805bbe1..13815713 100644
--- a/backend/tests/data/print/txt/qr_v1_m.txt
+++ b/backend/tests/data/print/txt/qr_v1_m.txt
@@ -1,21 +1,21 @@
-FE 2B F8
-82 02 08
-BA A2 E8
+FE 9B F8
+82 4A 08
 BA 92 E8
-BA AA E8
-82 92 08
+BA 5A E8
+BA 1A E8
+82 DA 08
 FE AB F8
-00 C0 00
-BE 13 E0
-38 BE 78
-87 6B 48
-4D 1E 38
-B2 E9 10
-00 E9 20
-FE 54 C8
-82 C1 A8
-BA D4 E0
-BA BF 60
-BA EB 60
-82 5F 30
-FE 89 20
+00 08 00
+A3 21 28
+A8 F7 58
+EA DD 90
+DD 57 18
+DF 5F C8
+00 A0 00
+FE E2 10
+82 08 88
+BA 62 38
+BA 76 40
+BA DD B8
+82 16 10
+FE BF F8
diff --git a/backend/tests/test_qr.c b/backend/tests/test_qr.c
index 961cc06b..cca27946 100644
--- a/backend/tests/test_qr.c
+++ b/backend/tests/test_qr.c
@@ -87,6 +87,7 @@ static void test_qr_options(int index, int debug) {
     for (int i = 0; i < data_size; i++) {
 
         if (index != -1 && i != index) continue;
+        if (debug & ZINT_DEBUG_TEST_PRINT) printf("i:%d\n", i);
 
         struct zint_symbol *symbol = ZBarcode_Create();
         assert_nonnull(symbol, "Symbol not created\n");
@@ -242,6 +243,7 @@ static void test_qr_input(int index, int generate, int debug) {
     for (int i = 0; i < data_size; i++) {
 
         if (index != -1 && i != index) continue;
+        if (debug & ZINT_DEBUG_TEST_PRINT) printf("i:%d\n", i);
 
         struct zint_symbol *symbol = ZBarcode_Create();
         assert_nonnull(symbol, "Symbol not created\n");
@@ -302,6 +304,7 @@ static void test_qr_gs1(int index, int generate, int debug) {
     for (int i = 0; i < data_size; i++) {
 
         if (index != -1 && i != index) continue;
+        if (debug & ZINT_DEBUG_TEST_PRINT) printf("i:%d\n", i);
 
         struct zint_symbol *symbol = ZBarcode_Create();
         assert_nonnull(symbol, "Symbol not created\n");
@@ -380,6 +383,7 @@ static void test_qr_optimize(int index, int generate, int debug) {
     for (int i = 0; i < data_size; i++) {
 
         if (index != -1 && i != index) continue;
+        if (debug & ZINT_DEBUG_TEST_PRINT) printf("i:%d\n", i);
 
         struct zint_symbol *symbol = ZBarcode_Create();
         assert_nonnull(symbol, "Symbol not created\n");
@@ -1195,12 +1199,36 @@ static void test_qr_encode(int index, int generate, int debug) {
                     "100000100100111010000"
                     "111111100011001000110"
                 },
+        /* 19*/ { BARCODE_QRCODE, UNICODE_MODE, 2, 1, -1, "1234567890", 0, 21, 21, "test_print example, automatic mask 001 (same score as mask 010)",
+                    "111111101001101111111"
+                    "100000100100101000001"
+                    "101110101001001011101"
+                    "101110100101101011101"
+                    "101110100001101011101"
+                    "100000101101101000001"
+                    "111111101010101111111"
+                    "000000000000100000000"
+                    "101000110010000100101"
+                    "101010001111011101011"
+                    "111010101101110110010"
+                    "110111010101011100011"
+                    "110111110101111111001"
+                    "000000001010000000000"
+                    "111111101110001000010"
+                    "100000100000100010001"
+                    "101110100110001000111"
+                    "101110100111011001000"
+                    "101110101101110110111"
+                    "100000100001011000010"
+                    "111111101011111111111"
+                },
     };
     int data_size = ARRAY_SIZE(data);
 
     for (int i = 0; i < data_size; i++) {
 
         if (index != -1 && i != index) continue;
+        if (debug & ZINT_DEBUG_TEST_PRINT) printf("i:%d\n", i);
 
         struct zint_symbol *symbol = ZBarcode_Create();
         assert_nonnull(symbol, "Symbol not created\n");