diff --git a/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.c b/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.c
index 3eb28e5f..14253b7b 100644
--- a/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.c
+++ b/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.c
@@ -2,6 +2,7 @@
 #include "crypto_onetimeauth_poly1305.h"
 #include "donna/poly1305_donna.h"
 
+/* LCOV_EXCL_START */
 static const crypto_onetimeauth_poly1305_implementation *implementation =
     &crypto_onetimeauth_poly1305_donna_implementation;
 
@@ -18,6 +19,7 @@ crypto_onetimeauth_poly1305_implementation_name(void)
 {
     return implementation->implementation_name();
 }
+/* LCOV_EXCL_STOP */
 
 int
 crypto_onetimeauth_poly1305(unsigned char *out, const unsigned char *in,
diff --git a/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c b/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
index 1435d07e..869ae8f1 100644
--- a/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
+++ b/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
@@ -93,12 +93,12 @@ safe_read(const int fd, void * const buf_, size_t count)
     assert(count > (size_t) 0U);
     do {
         while ((readnb = read(fd, buf, count)) < (ssize_t) 0 &&
-               errno == EINTR);
+               errno == EINTR);  /* LCOV_EXCL_LINE */
         if (readnb < (ssize_t) 0) {
-            return readnb;
+            return readnb; /* LCOV_EXCL_LINE */
         }
         if (readnb == (ssize_t) 0) {
-            break;
+            break; /* LCOV_EXCL_LINE */
         }
         count -= (size_t) readnb;
         buf += readnb;
diff --git a/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c b/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
index 4f864b5b..711c711c 100644
--- a/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
+++ b/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
@@ -83,12 +83,12 @@ safe_read(const int fd, void * const buf_, size_t count)
     assert(count > (size_t) 0U);
     do {
         while ((readnb = read(fd, buf, count)) < (ssize_t) 0 &&
-               errno == EINTR);
+               errno == EINTR); /* LCOV_EXCL_LINE */
         if (readnb < (ssize_t) 0) {
-            return readnb;
+            return readnb; /* LCOV_EXCL_LINE */
         }
         if (readnb == (ssize_t) 0) {
-            break;
+            break; /* LCOV_EXCL_LINE */
         }
         count -= (size_t) readnb;
         buf += readnb;