diff --git a/iocore/net/quic/Mock.h b/iocore/net/quic/Mock.h
index c0d28a3fa6d..eda260c04e4 100644
--- a/iocore/net/quic/Mock.h
+++ b/iocore/net/quic/Mock.h
@@ -194,13 +194,6 @@ class MockQUICConnectionInfoProvider : public QUICConnectionInfoProvider
     return NET_VCONNECTION_OUT;
   }
 
-  int
-  select_next_protocol(SSL *ssl, const unsigned char **out, unsigned char *outlen, const unsigned char *in,
-                       unsigned inlen) const override
-  {
-    return SSL_TLSEXT_ERR_OK;
-  }
-
   bool
   is_closed() const override
   {
@@ -512,13 +505,6 @@ class MockQUICConnection : public QUICConnection
     return negotiated_application_name_sv;
   }
 
-  int
-  select_next_protocol(SSL *ssl, const unsigned char **out, unsigned char *outlen, const unsigned char *in,
-                       unsigned inlen) const override
-  {
-    return SSL_TLSEXT_ERR_OK;
-  }
-
   int _transmit_count   = 0;
   int _retransmit_count = 0;
   Ptr<ProxyMutex> _mutex;
diff --git a/iocore/net/quic/test/test_QUICPacket.cc b/iocore/net/quic/test/test_QUICPacket.cc
index 35ffd5ea43c..b9125968e13 100644
--- a/iocore/net/quic/test/test_QUICPacket.cc
+++ b/iocore/net/quic/test/test_QUICPacket.cc
@@ -249,7 +249,8 @@ TEST_CASE("Sending Packet", "[quic]")
     CHECK(packet.is_crypto_packet());
 
     packet.store(buf, &len);
-    CHECK(len == packet.size() - 16);
+    // See above packet.size() CHECK: packet.size must be greater than 16.
+    CHECK(len == static_cast<size_t>(packet.size() - 16));
     CHECK(memcmp(buf, expected, len - 16) == 0);
   }
 
diff --git a/proxy/http3/test/test_QPACK.cc b/proxy/http3/test/test_QPACK.cc
index 88fb509b471..167ab7fea22 100644
--- a/proxy/http3/test/test_QPACK.cc
+++ b/proxy/http3/test/test_QPACK.cc
@@ -221,17 +221,16 @@ output_decoded_headers(FILE *fd, HTTPHdr **headers, uint64_t n)
     }
     fprintf(fd, "# stream %" PRIu64 "\n", i + 1);
     MIMEFieldIter field_iter;
-    for (MIMEField *field = header_set->iter_get_first(&field_iter); field != nullptr;
-         field            = header_set->iter_get_next(&field_iter)) {
-      int name_len;
-      int value_len;
+    for (auto const &field : *header_set) {
+      int name_len  = 0;
+      int value_len = 0;
       Arena arena;
-      const char *name   = field->name_get(&name_len);
+      const char *name   = field.name_get(&name_len);
       char *lowered_name = arena.str_store(name, name_len);
       for (int i = 0; i < name_len; i++) {
         lowered_name[i] = ParseRules::ink_tolower(lowered_name[i]);
       }
-      const char *value = field->value_get(&value_len);
+      const char *value = field.value_get(&value_len);
       fprintf(fd, "%.*s\t%.*s\n", name_len, lowered_name, value_len, value);
     }
     fprintf(fd, "\n");