diff --git a/backend/large.c b/backend/large.c
index 127dca12..c2db31fe 100644
--- a/backend/large.c
+++ b/backend/large.c
@@ -45,6 +45,7 @@
  *   https://github.com/fahickman/r128/blob/master/r128.h
  *   "R128 is released into the public domain. See LICENSE for details." LICENSE is The Unlicense.
  */
+#include <assert.h>
 #include <stdio.h>
 #ifdef _MSC_VER
 #include <malloc.h>
@@ -197,6 +198,7 @@ INTERNAL uint64_t large_div_u64(large_int *t, uint64_t v) {
 
     /* Compute qhat1 estimate */
 
+    assert(vn1 != 0); /* Suppress clang-tidy-14 clang-analyzer-core.DivideZero */
     qhat1 = tnhi / vn1; /* Divide first digit of v into first 2 digits of t */
     rhat = tnhi % vn1;
 
diff --git a/backend/qr.c b/backend/qr.c
index f9058721..383d2851 100644
--- a/backend/qr.c
+++ b/backend/qr.c
@@ -765,6 +765,8 @@ static void add_ecc(unsigned char fullstream[], const unsigned char datastream[]
         ecc_cw = rmqr_total_codewords[version - RMQR_VERSION] - data_cw;
     }
 
+    /* Suppress some clang-tidy clang-analyzer-core.UndefinedBinaryOperatorResult/uninitialized.Assign warnings */
+    assert(blocks > 0);
     short_data_block_length = data_cw / blocks;
     qty_long_blocks = data_cw % blocks;
     qty_short_blocks = blocks - qty_long_blocks;
@@ -840,7 +842,6 @@ static void add_ecc(unsigned char fullstream[], const unsigned char datastream[]
     }
 
     for (j = 0; j < data_cw; j++) {
-        // NOLINTNEXTLINE suppress clang-tidy warning: interleaved_data[data_cw] fully set
         fullstream[j] = interleaved_data[j];
     }
     for (j = 0; j < ecc_cw; j++) {