diff --git a/backend/tests/data/print/gif/code128_aim.gif b/backend/tests/data/print/gif/code128_aim.gif
index e2f87bf9..864a29a4 100644
Binary files a/backend/tests/data/print/gif/code128_aim.gif and b/backend/tests/data/print/gif/code128_aim.gif differ
diff --git a/backend/tests/data/print/gif/dotcode_aim_fig7.gif b/backend/tests/data/print/gif/dotcode_aim_fig7.gif
index a61fee6a..2af2d621 100644
Binary files a/backend/tests/data/print/gif/dotcode_aim_fig7.gif and b/backend/tests/data/print/gif/dotcode_aim_fig7.gif differ
diff --git a/backend/tests/data/print/gif/qr_v1_m.gif b/backend/tests/data/print/gif/qr_v1_m.gif
index 2d3b5d6e..700f8193 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/test_aztec.c b/backend/tests/test_aztec.c
index 8a47f09d..54fb4ac2 100644
--- a/backend/tests/test_aztec.c
+++ b/backend/tests/test_aztec.c
@@ -264,7 +264,75 @@ static void test_encode(void)
                     "00010001010101010101011"
                     "11101100000000000010110"
                },
-        /*  6*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "0", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (1st)",
+        /*  6*/ { BARCODE_AZTEC, GS1_MODE, -1, -1, "[01]95012345678903[3103]000123", 0, 19, 19, "#189 Follow embedded FLG(n) with FLG(0)",
+                    "0000000100001010101"
+                    "0001101111011000000"
+                    "0111100100010110100"
+                    "0011000110100100110"
+                    "0010110101010010110"
+                    "0101111111111110101"
+                    "0011110000000101000"
+                    "0101010111110100011"
+                    "1101110100010110100"
+                    "1000010101010111010"
+                    "0011110100010100110"
+                    "1000110111110111110"
+                    "0010110000000101010"
+                    "1111011111111111101"
+                    "1001001111001000100"
+                    "1111111110110100011"
+                    "0111000111101011001"
+                    "1000110111011000101"
+                    "1010100000101101001"
+               },
+        /*  7*/ { BARCODE_AZTEC, GS1_MODE, -1, -1, "[01]04610044273252[21]LRFX)k<C7ApWJ[91]003A[92]K8rNAqdvjmdxsmCVuj3FhaoNzQuq7Uff0sHXfz1TT/doiMaGQqNF+VPwMvwVbm1fxjzuDt6jxLCcc8o/tqbEDA==", 0, 45, 45, "#189 Follow embedded FLG(n) with FLG(0)",
+                    "000000101110011010101010010110011000001010111"
+                    "000110001111011100111101101110110000000000011"
+                    "001000101100101011000011111111101110111010101"
+                    "010010001000111100001101110011100111110100100"
+                    "001001100110001000011011011011000101001010010"
+                    "001101011110100001001101001101110111100111100"
+                    "101010101010101010101010101010101010101010101"
+                    "000111001111100010000000100000111001000111110"
+                    "111100111010000100100111100011001110001100001"
+                    "110101001000001101011100110101001110000101010"
+                    "000111111010001101111110100110001011001110001"
+                    "011000000000100001101100000000011000100011110"
+                    "001100110100000101000111111101110100011001010"
+                    "011010000111011010100100001101001111010000111"
+                    "100011100111010101011110000001010111001110111"
+                    "011010000001010110011000000101101011110100010"
+                    "001100100001010111111111111111110010101111100"
+                    "111010010111010010000000000011101100100011000"
+                    "010100110000110110111111111011010010011111100"
+                    "001011001110010110100000001010101111010011000"
+                    "001010101101100110101111101011100111111111000"
+                    "010001001100111010101000101011111100000100000"
+                    "101010101010101010101010101010101010101010101"
+                    "101100010101111010101000101010100000110101111"
+                    "011010101100110010101111101010000001001101101"
+                    "001110000010110010100000001011101111010011100"
+                    "011001100001111010111111111010001010001111000"
+                    "000001011101101010000000000011101100010110111"
+                    "110111111111001011111111111111110101101001101"
+                    "000010011011101001110000111000101101000000011"
+                    "111111101001101111011111110110101010001110001"
+                    "001010011011011100100101100100000100100101111"
+                    "100101100101110100010111010111001100001111011"
+                    "010111001001000111010101110101010111010111100"
+                    "001110110000001110001010000100110011101100101"
+                    "101001000110001000010101001110110010110000100"
+                    "101111100000010000110111010000010111111111111"
+                    "100000011010001000010001110100010100010111010"
+                    "101010101010101010101010101010101010101010101"
+                    "101001000011011010010001001100101110100010110"
+                    "001100100111001101011011111110110010011110100"
+                    "111100011011100010110001001111110011100011101"
+                    "101101111001110100000011101110110100011101011"
+                    "000011010110101110000101110100000111000011010"
+                    "101001110101010110100011010010001111001101101"
+               },
+        /*  8*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "0", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (1st)",
                     "11101010101"
                     "11111111111"
                     "01000000010"
@@ -277,7 +345,7 @@ static void test_encode(void)
                     "01111111111"
                     "00101010100"
                },
-        /*  7*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "25", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (2nd)",
+        /*  9*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "25", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (2nd)",
                     "11101100101"
                     "11111111111"
                     "01000000011"
@@ -290,7 +358,7 @@ static void test_encode(void)
                     "01111111111"
                     "00100100000"
                },
-        /*  8*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "125", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (3rd)",
+        /* 10*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "125", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (3rd)",
                     "11110101101"
                     "11111111111"
                     "11000000011"
@@ -303,7 +371,7 @@ static void test_encode(void)
                     "01111111111"
                     "00111101000"
                },
-        /*  9*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "255", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (4th)",
+        /* 11*/ { BARCODE_AZRUNE, UNICODE_MODE, -1, -1, "255", 0, 11, 11, "ISO/IEC 24778:2008 Figure A.1 (4th)",
                     "11110101001"
                     "11111111111"
                     "01000000011"
@@ -815,7 +883,7 @@ static void test_fuzz(void)
 int main()
 {
     test_encode();
-    //test_fuzz();
+    test_fuzz();
 
     testReport();
 
diff --git a/backend/tests/test_print.c b/backend/tests/test_print.c
index 78c8f81f..06bb0631 100644
--- a/backend/tests/test_print.c
+++ b/backend/tests/test_print.c
@@ -34,7 +34,7 @@
 
 //#define TEST_PRINT_GENERATE_EXPECTED    1
 //#define TEST_PRINT_OVERWRITE_EXPECTED   "bmp,emf,eps,gif,pcx,png,svg,tif,txt"
-#define TEST_PRINT_OVERWRITE_EXPECTED   ""
+//#define TEST_PRINT_OVERWRITE_EXPECTED   "gif"
 
 static void test_print(void)
 {