diff --git a/backend/tests/test_output.c b/backend/tests/test_output.c
index 37307405..7b90dfe5 100644
--- a/backend/tests/test_output.c
+++ b/backend/tests/test_output.c
@@ -120,7 +120,8 @@ static void test_colour_get_rgb(const testCtx *const p_ctx) {
     testStart("test_colour_get_rgb");
 
     for (i = 0; i < data_size; i++) {
-        unsigned char red, green, blue, alpha, rgb_alpha;
+        /* Suppress clang-16 run-time exception MemorySanitizer: use-of-uninitialized-value (fixed in clang-17) */
+        unsigned char red = 0, green = 0, blue = 0, alpha = 0, rgb_alpha = 0;
         int cyan, magenta, yellow, black;
         int have_alpha;
         char rgb[9];
@@ -356,7 +357,7 @@ static void test_out_putsf(const testCtx *const p_ctx) {
     int i;
 
     FILE *fp;
-    char buf[512];
+    char buf[512] = {0}; /* Suppress clang-16/17 run-time exception MemorySanitizer: use-of-uninitialized-value */
 
     testStart("test_out_putsf");
 
diff --git a/backend/tests/test_vector.c b/backend/tests/test_vector.c
index 5877705e..2159d30c 100644
--- a/backend/tests/test_vector.c
+++ b/backend/tests/test_vector.c
@@ -2118,40 +2118,50 @@ static void test_text_gap(const testCtx *const p_ctx) {
         /*  9*/ { BARCODE_CODE11, -1, -1, -1, 0.8, 0, "1234", "", 0, 50, 1, 62, 124, 115.88, 62.0, 112.9444, -1, -1 },
         /* 10*/ { BARCODE_CODE11, -1, -1, -1, 0.9, 0, "1234", "", 0, 50, 1, 62, 124, 116.08, 62.0, 113.1444, -1, -1 },
         /* 11*/ { BARCODE_CODE11, -1, -1, -1, 1.0, 0, "1234", "", 0, 50, 1, 62, 124, 116.28, 62.0, 113.3444, -1, -1 }, /* Same as default */
-        /* 12*/ { BARCODE_CODE11, -1, -1, -1, 1.1, 0, "1234", "", 0, 50, 1, 62, 124, 116.48, 62.0, 113.5444, -1, -1 },
-        /* 13*/ { BARCODE_CODE11, -1, -1, -1, 1.5, 0, "1234", "", 0, 50, 1, 62, 124, 117.28, 62.0, 114.3444, -1, -1 },
-        /* 14*/ { BARCODE_CODE11, -1, -1, -1, 2.0, 0, "1234", "", 0, 50, 1, 62, 124, 118.28, 62.0, 115.3444, -1, -1 },
-        /* 15*/ { BARCODE_CODE11, -1, -1, -1, 3.0, 0, "1234", "", 0, 50, 1, 62, 124, 120.28, 62.0, 117.3444, -1, -1 },
-        /* 16*/ { BARCODE_CODE11, -1, -1, -1, 4.0, 0, "1234", "", 0, 50, 1, 62, 124, 122.28, 62.0, 119.3444, -1, -1 },
-        /* 17*/ { BARCODE_CODE11, -1, -1, -1, 5.0, 0, "1234", "", 0, 50, 1, 62, 124, 124.28, 62.0, 121.3444, -1, -1 },
-        /* 18*/ { BARCODE_CODE11, -1, -1, -1, 10.0, 0, "1234", "", 0, 50, 1, 62, 124, 134.28, 62.0, 131.3444, -1, -1 },
-        /* 19*/ { BARCODE_CODE11, -1, -1, -1, 0, 3.0, "1234", "", 0, 50, 1, 62, 372, 348.839996, 186.0, 340.0332, -1, -1 }, /* Scale default */
-        /* 20*/ { BARCODE_CODE11, -1, -1, -1, 0.1, 3.0, "1234", "", 0, 50, 1, 62, 372, 343.44, 186.0, 334.6332, -1, -1 }, /* Scale */
-        /* 21*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763", "", 0, 50, 1, 95, 226, 118, 74.0, 117.2, -1, -1 }, /* Default */
-        /* 22*/ { BARCODE_UPCA, -1, -1, -1, 0.1, 0, "01457130763", "", 0, 50, 1, 95, 226, 116.2, 74.0, 115.4, -1, -1 },
-        /* 23*/ { BARCODE_UPCA, -1, -1, -1, 0.6, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.2, 74.0, 116.4, -1, -1 },
-        /* 24*/ { BARCODE_UPCA, -1, -1, -1, 0.7, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.4, 74.0, 116.6, -1, -1 },
-        /* 25*/ { BARCODE_UPCA, -1, -1, -1, 0.75, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.5, 74.0, 116.7, -1, -1 },
-        /* 26*/ { BARCODE_UPCA, -1, -1, -1, 0.8, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.6, 74.0, 116.8, -1, -1 },
-        /* 27*/ { BARCODE_UPCA, -1, -1, -1, 1.0, 0, "01457130763", "", 0, 50, 1, 95, 226, 118, 74.0, 117.2, -1, -1 }, /* Same as default */
-        /* 28*/ { BARCODE_UPCA, -1, -1, -1, 1.6, 0, "01457130763", "", 0, 50, 1, 95, 226, 119.2, 74.0, 118.4, -1, -1 },
-        /* 29*/ { BARCODE_UPCA, -1, -1, -1, 1.6, 2.5, "01457130763", "", 0, 50, 1, 95, 565, 298, 185.0, 296.0, -1, -1 }, /* Scale */
-        /* 30*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 74.0, 117.2, -1, -1 }, /* Default */
-        /* 31*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 230.0, 18, 4.0, 82 }, /* Default */
-        /* 32*/ { BARCODE_UPCA, -1, -1, -1, 0.1, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 116.2, 230.0, 16.2, 4.0, 83.8 },
-        /* 33*/ { BARCODE_UPCA, -1, -1, -1, 0.75, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 117.5, 230.0, 17.5, 4.0, 82.5 },
-        /* 34*/ { BARCODE_UPCA, -1, -1, -1, 0.9, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 117.8, 230.0, 17.8, 4.0, 82.2 },
-        /* 35*/ { BARCODE_UPCA, -1, -1, -1, 1.0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 74.0, 117.2, -1, -1 }, /* Same as default */
-        /* 36*/ { BARCODE_UPCA, -1, -1, -1, 4.2, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 124.4, 230.0, 24.4, 4.0, 75.6 },
-        /* 37*/ { BARCODE_UPCA_CC, -1, -1, -1, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 74.0, 117.2, -1, -1 }, /* Default */
-        /* 38*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.1, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 116.2, 74.0, 115.4, -1, -1 },
-        /* 39*/ { BARCODE_UPCA_CC, -1, -1, -1, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 236.0, 42, 4.0, 58 }, /* Default */
-        /* 40*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.1, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 116.2, 236.0, 40.2, 4.0, 59.8 },
-        /* 41*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.75, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 117.5, 236.0, 41.5, 4.0, 58.5 },
-        /* 42*/ { BARCODE_UPCA_CC, -1, -1, -1, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 236.0, 42, 4.0, 58 }, /* Same as default */
-        /* 43*/ { BARCODE_UPCA_CC, -1, -1, -1, 1.5, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 119.0, 236.0, 43.0, 4.0, 57.0 },
-        /* 44*/ { BARCODE_UPCA_CC, -1, -1, 0, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 110, 236.0, 42, 4.0, 58 }, /* Hide text default */
-        /* 45*/ { BARCODE_UPCA_CC, -1, -1, 0, 1.5, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 110, 236.0, 43.0, 4.0, 57.0 }, /* Hide text */
+        /* 12*/ { BARCODE_CODE11, -1, -1, -1, 1.1, 0, "1234", "", 0, 50, 1, 62, 124, 116.479996, 62.0, 113.5444, -1, -1 },
+        /* 13*/ { BARCODE_CODE11, -1, -1, -1, 1.2, 0, "1234", "", 0, 50, 1, 62, 124, 116.68, 62.0, 113.7444, -1, -1 },
+        /* 14*/ { BARCODE_CODE11, -1, -1, -1, 1.3, 0, "1234", "", 0, 50, 1, 62, 124, 116.88, 62.0, 113.9444, -1, -1 },
+        /* 15*/ { BARCODE_CODE11, -1, -1, -1, 1.4, 0, "1234", "", 0, 50, 1, 62, 124, 117.08, 62.0, 114.1444, -1, -1 },
+        /* 16*/ { BARCODE_CODE11, -1, -1, -1, 1.5, 0, "1234", "", 0, 50, 1, 62, 124, 117.28, 62.0, 114.3444, -1, -1 },
+        /* 17*/ { BARCODE_CODE11, -1, -1, -1, 2.0, 0, "1234", "", 0, 50, 1, 62, 124, 118.28, 62.0, 115.3444, -1, -1 },
+        /* 18*/ { BARCODE_CODE11, -1, -1, -1, 2.1, 0, "1234", "", 0, 50, 1, 62, 124, 118.479996, 62.0, 115.5444, -1, -1 },
+        /* 19*/ { BARCODE_CODE11, -1, -1, -1, 2.6, 0, "1234", "", 0, 50, 1, 62, 124, 119.479996, 62.0, 116.5444, -1, -1 },
+        /* 20*/ { BARCODE_CODE11, -1, -1, -1, 3.0, 0, "1234", "", 0, 50, 1, 62, 124, 120.28, 62.0, 117.3444, -1, -1 },
+        /* 21*/ { BARCODE_CODE11, -1, -1, -1, 4.0, 0, "1234", "", 0, 50, 1, 62, 124, 122.28, 62.0, 119.3444, -1, -1 },
+        /* 22*/ { BARCODE_CODE11, -1, -1, -1, 5.0, 0, "1234", "", 0, 50, 1, 62, 124, 124.28, 62.0, 121.3444, -1, -1 },
+        /* 23*/ { BARCODE_CODE11, -1, -1, -1, 10.0, 0, "1234", "", 0, 50, 1, 62, 124, 134.28, 62.0, 131.3444, -1, -1 },
+        /* 24*/ { BARCODE_CODE11, -1, -1, -1, 0, 3.0, "1234", "", 0, 50, 1, 62, 372, 348.84, 186.0, 340.0332, -1, -1 }, /* Scale default */
+        /* 25*/ { BARCODE_CODE11, -1, -1, -1, 0.1, 3.0, "1234", "", 0, 50, 1, 62, 372, 343.44, 186.0, 334.6332, -1, -1 }, /* Scale */
+        /* 26*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763", "", 0, 50, 1, 95, 226, 118, 74.0, 117.2, -1, -1 }, /* Default */
+        /* 27*/ { BARCODE_UPCA, -1, -1, -1, 0.1, 0, "01457130763", "", 0, 50, 1, 95, 226, 116.2, 74.0, 115.4, -1, -1 },
+        /* 28*/ { BARCODE_UPCA, -1, -1, -1, 0.6, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.2, 74.0, 116.4, -1, -1 },
+        /* 29*/ { BARCODE_UPCA, -1, -1, -1, 0.7, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.4, 74.0, 116.6, -1, -1 },
+        /* 30*/ { BARCODE_UPCA, -1, -1, -1, 0.75, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.5, 74.0, 116.7, -1, -1 },
+        /* 31*/ { BARCODE_UPCA, -1, -1, -1, 0.8, 0, "01457130763", "", 0, 50, 1, 95, 226, 117.6, 74.0, 116.8, -1, -1 },
+        /* 32*/ { BARCODE_UPCA, -1, -1, -1, 1.0, 0, "01457130763", "", 0, 50, 1, 95, 226, 118, 74.0, 117.2, -1, -1 }, /* Same as default */
+        /* 33*/ { BARCODE_UPCA, -1, -1, -1, 1.1, 0, "01457130763", "", 0, 50, 1, 95, 226, 118.2, 74.0, 117.4, -1, -1 },
+        /* 34*/ { BARCODE_UPCA, -1, -1, -1, 1.6, 0, "01457130763", "", 0, 50, 1, 95, 226, 119.2, 74.0, 118.4, -1, -1 },
+        /* 35*/ { BARCODE_UPCA, -1, -1, -1, 1.6, 2.5, "01457130763", "", 0, 50, 1, 95, 565, 298, 185.0, 296.0, -1, -1 }, /* Scale */
+        /* 36*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 74.0, 117.2, -1, -1 }, /* Default */
+        /* 37*/ { BARCODE_UPCA, -1, -1, -1, 0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 230.0, 18, 4.0, 82 }, /* Default */
+        /* 38*/ { BARCODE_UPCA, -1, -1, -1, 0.1, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 116.2, 230.0, 16.2, 4.0, 83.8 },
+        /* 39*/ { BARCODE_UPCA, -1, -1, -1, 0.6, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 117.2, 230.0, 17.2, 4.0, 82.8 },
+        /* 40*/ { BARCODE_UPCA, -1, -1, -1, 0.75, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 117.5, 230.0, 17.5, 4.0, 82.5 },
+        /* 41*/ { BARCODE_UPCA, -1, -1, -1, 0.9, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 117.8, 230.0, 17.8, 4.0, 82.2 },
+        /* 42*/ { BARCODE_UPCA, -1, -1, -1, 1.0, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118, 74.0, 117.2, -1, -1 }, /* Same as default */
+        /* 43*/ { BARCODE_UPCA, -1, -1, -1, 1.1, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 118.2, 74.0, 117.4, -1, -1 },
+        /* 44*/ { BARCODE_UPCA, -1, -1, -1, 4.2, 0, "01457130763+10", "", 0, 50, 1, 124, 276, 124.4, 230.0, 24.4, 4.0, 75.6 },
+        /* 45*/ { BARCODE_UPCA_CC, -1, -1, -1, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 74.0, 117.2, -1, -1 }, /* Default */
+        /* 46*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.1, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 116.2, 74.0, 115.4, -1, -1 },
+        /* 47*/ { BARCODE_UPCA_CC, -1, -1, -1, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 236.0, 42, 4.0, 58 }, /* Default */
+        /* 48*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.1, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 116.2, 236.0, 40.2, 4.0, 59.8 },
+        /* 49*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.6, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 117.2, 236.0, 41.2, 4.0, 58.8 },
+        /* 50*/ { BARCODE_UPCA_CC, -1, -1, -1, 0.75, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 117.5, 236.0, 41.5, 4.0, 58.5 },
+        /* 51*/ { BARCODE_UPCA_CC, -1, -1, -1, 1.0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118, 236.0, 42, 4.0, 58 }, /* Same as default */
+        /* 52*/ { BARCODE_UPCA_CC, -1, -1, -1, 1.1, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 118.2, 236.0, 42.2, 4.0, 57.8 },
+        /* 53*/ { BARCODE_UPCA_CC, -1, -1, -1, 1.5, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 119.0, 236.0, 43.0, 4.0, 57.0 },
+        /* 54*/ { BARCODE_UPCA_CC, -1, -1, 0, 0, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 110, 236.0, 42, 4.0, 58 }, /* Hide text default */
+        /* 55*/ { BARCODE_UPCA_CC, -1, -1, 0, 1.5, 0, "01457130763+10", "[91]12", 0, 50, 7, 127, 276, 110, 236.0, 43.0, 4.0, 57.0 }, /* Hide text */
     };
     int data_size = ARRAY_SIZE(data);
     int i, length, ret;
diff --git a/backend/vector.c b/backend/vector.c
index 67143081..6f1944a8 100644
--- a/backend/vector.c
+++ b/backend/vector.c
@@ -505,7 +505,7 @@ INTERNAL int plot_vector(struct zint_symbol *symbol, int rotate_angle, int file_
                 textoffset = guard_descent;
             }
         } else {
-            textoffset = font_height + text_gap + antialias_fudge;
+            textoffset = font_height + stripf(text_gap + antialias_fudge);
         }
     }