diff --git a/src/libsodium/crypto_scalarmult/curve25519/scalarmult_curve25519.c b/src/libsodium/crypto_scalarmult/curve25519/scalarmult_curve25519.c
index 72968ffe..13eda805 100644
--- a/src/libsodium/crypto_scalarmult/curve25519/scalarmult_curve25519.c
+++ b/src/libsodium/crypto_scalarmult/curve25519/scalarmult_curve25519.c
@@ -24,7 +24,7 @@ crypto_scalarmult_curve25519(unsigned char *q, const unsigned char *n,
     unsigned char d = 0;
 
     if (implementation->mult(q, n, p) != 0) {
-        return -1;
+        return -1; /* LCOV_EXCL_LINE */
     }
     for (i = 0; i < crypto_scalarmult_curve25519_BYTES; i++) {
         d |= q[i];
diff --git a/src/libsodium/sodium/core.c b/src/libsodium/sodium/core.c
index 8e49b467..8c500e80 100644
--- a/src/libsodium/sodium/core.c
+++ b/src/libsodium/sodium/core.c
@@ -184,8 +184,10 @@ sodium_misuse(void)
             handler();
         }
     }
+/* LCOV_EXCL_START */
     abort();
 }
+/* LCOV_EXCL_STOP */
 
 int
 sodium_set_misuse_handler(void (*handler)(void))
diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index c29ccbd3..662b54a7 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -63,6 +63,7 @@
 static size_t        page_size;
 static unsigned char canary[CANARY_SIZE];
 
+/* LCOV_EXCL_START */
 #ifdef HAVE_WEAK_SYMBOLS
 __attribute__((weak)) void
 _sodium_dummy_symbol_to_prevent_memzero_lto(void *const  pnt,
@@ -72,6 +73,7 @@ _sodium_dummy_symbol_to_prevent_memzero_lto(void *const  pnt,
     (void) len; /* LCOV_EXCL_LINE */
 }
 #endif
+/* LCOV_EXCL_STOP */
 
 void
 sodium_memzero(void *const pnt, const size_t len)