diff --git a/test/unittests/test_buffer.cpp b/test/unittests/test_buffer.cpp
index 38756956..720e405f 100644
--- a/test/unittests/test_buffer.cpp
+++ b/test/unittests/test_buffer.cpp
@@ -10,7 +10,7 @@ TEST(buffer, const_buffer_ref_1)
     static unsigned char hello[] = "hello world";
     Buffer buf(hello, sizeof(hello) - 1, true);
     ConstBuffer &cbuf = const_buffer_ref(buf);
-    EXPECT_EQ(cbuf.size(), 11);
+    EXPECT_EQ(cbuf.size(), 11u);
     EXPECT_EQ(buf_to_string(buf), buf_to_string(cbuf));
 }
 
@@ -20,7 +20,7 @@ TEST(buffer, const_buffer_ref_2)
     BufferAllocated buf(64, 0);
     buf_append_string(buf, "hello world");
     ConstBuffer &cbuf = const_buffer_ref(buf);
-    EXPECT_EQ(cbuf.size(), 11);
+    EXPECT_EQ(cbuf.size(), 11u);
     EXPECT_EQ(buf_to_string(buf), buf_to_string(cbuf));
 }
 
@@ -30,7 +30,7 @@ TEST(buffer, my_const_buffer_1)
     typedef ConstBufferType<const char> MyConstBuffer;
     static const char hello[] = "hello world";
     MyConstBuffer cbuf(hello, sizeof(hello) - 1, true);
-    EXPECT_EQ(cbuf.size(), 11);
+    EXPECT_EQ(cbuf.size(), 11u);
     EXPECT_EQ(std::string(cbuf.c_data(), cbuf.size()), "hello world");
 }
 
diff --git a/test/unittests/test_crypto.cpp b/test/unittests/test_crypto.cpp
index eeb68a60..9dcdfda9 100644
--- a/test/unittests/test_crypto.cpp
+++ b/test/unittests/test_crypto.cpp
@@ -54,7 +54,7 @@ TEST(crypto, hmac)
 
     uint8_t hash[20];
 
-    ASSERT_EQ(hmac.final(hash), 20);
+    ASSERT_EQ(hmac.final(hash), 20u);
 
     /* Google test does not seem to have a good memory equality test macro */
     ASSERT_EQ(std::memcmp(hash, goodhash, sizeof(goodhash)), 0);
@@ -64,7 +64,7 @@ TEST(crypto, hmac)
     /* Do this again to ensure that reset works */
     hmac.update(ipsum, std::strlen(ipsumlorem));
     hmac.update(ipsum, std::strlen(ipsumlorem));
-    ASSERT_EQ(hmac.final(hash), 20);
+    ASSERT_EQ(hmac.final(hash), 20u);
 
     /* Google test does not seem to have a good memory equality test macro */
     ASSERT_EQ(std::memcmp(hash, goodhash, sizeof(goodhash)), 0);
@@ -78,7 +78,7 @@ TEST(crypto, hmac)
     /* Do this again to ensure that reset works */
     hmac.update(ipsum, std::strlen(ipsumlorem));
     hmac.update(ipsum, std::strlen(ipsumlorem));
-    ASSERT_EQ(hmac.final(hash), 20);
+    ASSERT_EQ(hmac.final(hash), 20u);
 
     /* Google test does not seem to have a good memory equality test macro */
     ASSERT_EQ(std::memcmp(hash, goodhash, sizeof(goodhash)), 0);
diff --git a/test/unittests/test_dns.cpp b/test/unittests/test_dns.cpp
index 5502c747..bdc36108 100644
--- a/test/unittests/test_dns.cpp
+++ b/test/unittests/test_dns.cpp
@@ -48,12 +48,12 @@ TEST(Dns, Options)
 
     DnsOptions dns(config);
 
-    ASSERT_EQ(dns.search_domains.size(), 3);
+    ASSERT_EQ(dns.search_domains.size(), 3u);
     ASSERT_EQ(dns.search_domains[0], "domain0");
     ASSERT_EQ(dns.search_domains[1], "domain1");
     ASSERT_EQ(dns.search_domains[2], "domain2");
 
-    ASSERT_EQ(dns.servers.size(), 3);
+    ASSERT_EQ(dns.servers.size(), 3u);
 
     int i = 1;
     for (const auto &keyval : dns.servers)
@@ -67,12 +67,12 @@ TEST(Dns, Options)
 
             ASSERT_TRUE(server.address4.specified());
             ASSERT_EQ(server.address4.to_string(), "2.2.2.2");
-            ASSERT_EQ(server.port4, 5353);
+            ASSERT_EQ(server.port4, 5353u);
 
             ASSERT_TRUE(server.address6.unspecified());
-            ASSERT_EQ(server.port6, 0);
+            ASSERT_EQ(server.port6, 0u);
 
-            ASSERT_EQ(server.domains.size(), 2);
+            ASSERT_EQ(server.domains.size(), 2u);
             ASSERT_EQ(server.domain_type, DnsServer::DomainType::Resolve);
             ASSERT_EQ(server.domains[0], "rdom0");
             ASSERT_EQ(server.domains[1], "rdom1");
@@ -88,13 +88,13 @@ TEST(Dns, Options)
 
             ASSERT_TRUE(server.address4.specified());
             ASSERT_EQ(server.address4.to_string(), "1.1.1.1");
-            ASSERT_EQ(server.port4, 0);
+            ASSERT_EQ(server.port4, 0u);
 
             ASSERT_TRUE(server.address6.specified());
             ASSERT_EQ(server.address6.to_string(), "1::1");
-            ASSERT_EQ(server.port6, 5353);
+            ASSERT_EQ(server.port6, 5353u);
 
-            ASSERT_EQ(server.domains.size(), 1);
+            ASSERT_EQ(server.domains.size(), 1u);
             ASSERT_EQ(server.domain_type, DnsServer::DomainType::Exclude);
             ASSERT_EQ(server.domains[0], "xdom0");
 
@@ -109,13 +109,13 @@ TEST(Dns, Options)
 
             ASSERT_TRUE(server.address4.specified());
             ASSERT_EQ(server.address4.to_string(), "3.2.1.0");
-            ASSERT_EQ(server.port4, 4242);
+            ASSERT_EQ(server.port4, 4242u);
 
             ASSERT_TRUE(server.address6.specified());
             ASSERT_EQ(server.address6.to_string(), "3::3");
-            ASSERT_EQ(server.port6, 0);
+            ASSERT_EQ(server.port6, 0u);
 
-            ASSERT_EQ(server.domains.size(), 0);
+            ASSERT_EQ(server.domains.size(), 0u);
             ASSERT_EQ(server.domain_type, DnsServer::DomainType::Unset);
 
             ASSERT_EQ(server.dnssec, DnsServer::Security::No);
@@ -142,8 +142,8 @@ TEST(Dns, OptionsMerger)
     config.update_map();
 
     merger.merge(pushed, config);
-    ASSERT_EQ(config.size(), 2);
-    ASSERT_EQ(pushed.size(), 2);
+    ASSERT_EQ(config.size(), 2u);
+    ASSERT_EQ(pushed.size(), 2u);
     ASSERT_EQ(pushed[0].ref(4), "::1");
     ASSERT_EQ(pushed[1].ref(4), "2.2.2.2");
 }
diff --git a/test/unittests/test_http_proxy.cpp b/test/unittests/test_http_proxy.cpp
index 446d9452..d3c9d480 100644
--- a/test/unittests/test_http_proxy.cpp
+++ b/test/unittests/test_http_proxy.cpp
@@ -45,7 +45,7 @@ TEST(HttpProxyClient, Options)
     ASSERT_EQ(po->password, "pazzword");
     ASSERT_EQ(po->http_version, "1.1");
     ASSERT_EQ(po->user_agent, "Mosaic/0.9");
-    ASSERT_EQ(po->headers.size(), 1);
+    ASSERT_EQ(po->headers.size(), 1u);
     ASSERT_EQ(po->headers.at(0)->p1, "X-Greeting");
     ASSERT_EQ(po->headers.at(0)->p2, "Hi mom!");
 
diff --git a/test/unittests/test_optfilt.cpp b/test/unittests/test_optfilt.cpp
index b787cc21..c16ea79c 100644
--- a/test/unittests/test_optfilt.cpp
+++ b/test/unittests/test_optfilt.cpp
@@ -73,7 +73,7 @@ TEST(PushedOptionsFilter, RouteNopullEnabled)
     dst.extend(src, &route_nopull_enabled);
     std::string filter_output(testLog->stopCollecting());
 
-    ASSERT_EQ(1, dst.size())
+    ASSERT_EQ(1u, dst.size())
         << "Too few options have been filtered by --route-nopull" << std::endl
         << filter_output;
 
@@ -168,7 +168,7 @@ TEST(PushedOptionsFilter, PullFilterIgnoreAll)
     dst.extend(src, &filter_all);
     std::string filter_output(testLog->stopCollecting());
 
-    ASSERT_EQ(0, dst.size())
+    ASSERT_EQ(0u, dst.size())
         << "Not all options have been ignored by --pull-filter" << std::endl
         << filter_output;
 }
@@ -209,7 +209,7 @@ TEST(PushedOptionsFilter, PullFilterAcceptWhitespace)
     dst.extend(src, &accept_opt3);
     std::string filter_output(testLog->stopCollecting());
 
-    ASSERT_EQ(2, dst.size())
+    ASSERT_EQ(2u, dst.size())
         << "Not all option3's have been accepted by --pull-filter" << std::endl
         << filter_output;
 }
@@ -233,7 +233,7 @@ TEST(PushedOptionsFilter, PullFilterIgnoreQuotedWhitespace)
     dst.extend(src, &accept_opt2_single_space);
     std::string filter_output(testLog->stopCollecting());
 
-    ASSERT_EQ(1, dst.size())
+    ASSERT_EQ(1u, dst.size())
         << "Too many options have been accepted by --pull-filter" << std::endl
         << filter_output;
 
@@ -264,7 +264,7 @@ TEST(PushedOptionsFilter, PullFilterOverrideRouteNopull)
     dst.extend(src, &override_route_nopull);
     std::string filter_output(testLog->stopCollecting());
 
-    ASSERT_EQ(2, dst.size())
+    ASSERT_EQ(2u, dst.size())
         << "Expected two route option to be accepted" << std::endl
         << filter_output;
 
@@ -275,10 +275,10 @@ TEST(PushedOptionsFilter, PullFilterOverrideRouteNopull)
     ASSERT_EQ(dst[1].ref(0), "route")
         << dst[1].ref(0) << " instead of route option has been accepted" << std::endl
         << filter_output;
-    ASSERT_EQ(3, dst[0].size())
+    ASSERT_EQ(3u, dst[0].size())
         << "The host route option has been accepted, expected network route" << std::endl
         << filter_output;
-    ASSERT_EQ(3, dst[1].size())
+    ASSERT_EQ(3u, dst[1].size())
         << "The host route option has been accepted, expected network route" << std::endl
         << filter_output;
 }
diff --git a/test/unittests/test_parseargv.cpp b/test/unittests/test_parseargv.cpp
index 225f61d4..f1e8886c 100644
--- a/test/unittests/test_parseargv.cpp
+++ b/test/unittests/test_parseargv.cpp
@@ -160,7 +160,7 @@ TEST(argv, parsetest)
     extract_auth_token(opt);
     extract_ifconfig(opt);
     verify_topology(opt);
-    ASSERT_EQ(1066, limits.get_bytes());
+    ASSERT_EQ(1066u, limits.get_bytes());
 }
 
 static void csv_test(const std::string &str)
diff --git a/test/unittests/test_peer_fingerprint.cpp b/test/unittests/test_peer_fingerprint.cpp
index 680e70da..2653119f 100644
--- a/test/unittests/test_peer_fingerprint.cpp
+++ b/test/unittests/test_peer_fingerprint.cpp
@@ -66,7 +66,7 @@ TEST(PeerFingerprint, parse_config)
     };
 
     TestPeerFingerprints fps(cfg, test_fingerprint.size());
-    ASSERT_EQ(fps.size(), 5);
+    ASSERT_EQ(fps.size(), 5u);
 
     for (std::size_t i = 1; i <= fps.size(); ++i)
     {
diff --git a/test/unittests/test_prefixlen.cpp b/test/unittests/test_prefixlen.cpp
index 7a9440e3..539a3eea 100644
--- a/test/unittests/test_prefixlen.cpp
+++ b/test/unittests/test_prefixlen.cpp
@@ -53,7 +53,7 @@ TEST(IPAddr, test32)
     {
         const IPv4::Addr::base_type mask = prefix_len_to_netmask(i);
         const int pl = prefix_len(mask);
-        ASSERT_EQ(pl, i);
+        ASSERT_EQ(pl, (int)i);
 
         // IPv4::Addr a = IPv4::Addr::from_uint32(mask);
         // std::cout << i << ' ' << pl << ' ' << a << std::endl;
@@ -82,4 +82,4 @@ void testbig() // exhaustive test of all 2^32 possible netmask values
         if (++mask == 0)
             break;
     }
-}
\ No newline at end of file
+}
diff --git a/test/unittests/test_relack.cpp b/test/unittests/test_relack.cpp
index 5786597d..859ef845 100644
--- a/test/unittests/test_relack.cpp
+++ b/test/unittests/test_relack.cpp
@@ -33,7 +33,7 @@ TEST(relack, test_size_1)
     for (auto i = id_t(1); i <= ACK_CNT; ++i)
         ra.push_back(i);
     EXPECT_EQ(ra.size(), ACK_CNT);
-    EXPECT_EQ(ra.resend_size(), 0);
+    EXPECT_EQ(ra.resend_size(), size_t{0});
 }
 
 TEST(relack, test_prepend_1)
@@ -55,12 +55,12 @@ TEST(relack, test_prepend_1)
         // Add 4 packets to a CONTROL packet, should reduce number by 4
         ra.prepend(buf, false);
         EXPECT_EQ(ra.size(), ACK_CNT - 4);
-        EXPECT_EQ(ra.resend_size(), 4);
+        EXPECT_EQ(ra.resend_size(), size_t{4});
 
         // Add packets to an ACK_V1 packet, should reduce number by up to 8
         ra.prepend(buf, true);
-        EXPECT_EQ(ra.size(), 0);
-        EXPECT_EQ(ra.resend_size(), 8);
+        EXPECT_EQ(ra.size(), size_t{0});
+        EXPECT_EQ(ra.resend_size(), size_t{8});
     }
 
     {
@@ -69,7 +69,7 @@ TEST(relack, test_prepend_1)
 
         ra.prepend(buf, false); // resending should not change array sizes
         EXPECT_EQ(ra.size(), size_t{0});
-        EXPECT_EQ(ra.resend_size(), 8);
+        EXPECT_EQ(ra.resend_size(), size_t{8});
     }
 
     {
@@ -78,7 +78,7 @@ TEST(relack, test_prepend_1)
 
         ra.prepend(buf, false);
         EXPECT_EQ(ra.size(), size_t{0});
-        EXPECT_EQ(ra.resend_size(), 8);
+        EXPECT_EQ(ra.resend_size(), size_t{8});
     }
 }
 
@@ -134,22 +134,22 @@ TEST(relack, test_ack_2)
         auto buf = Buffer(storage, storageSize, false);
         buf.init_headroom(storageSize / 2);
 
-        EXPECT_EQ(ra.size(), 9);
-        EXPECT_EQ(ra.resend_size(), 0);
+        EXPECT_EQ(ra.size(), size_t{9});
+        EXPECT_EQ(ra.resend_size(), size_t{0});
 
         ra.prepend(buf, true);
-        EXPECT_EQ(ra.size(), 1);
-        EXPECT_EQ(ra.resend_size(), 8);
+        EXPECT_EQ(ra.size(), size_t{1});
+        EXPECT_EQ(ra.resend_size(), size_t{8});
 
         RelSendMck send{};
         auto num = ra.ack(send, buf, false);
         EXPECT_EQ(send.mAcks.size(), size_t{0});
-        EXPECT_EQ(num, 8);
+        EXPECT_EQ(num, size_t{8});
 
         RelSendMck send2;
         ra.prepend(buf, true);
         num = ra.ack(send2, buf, true);
-        EXPECT_EQ(num, 8);
+        EXPECT_EQ(num, size_t{8});
         EXPECT_EQ(send2.mAcks.size(), size_t{8});
     }
 }
diff --git a/test/unittests/test_route_emulation.cpp b/test/unittests/test_route_emulation.cpp
index 4f6ff367..9c8cfe2b 100644
--- a/test/unittests/test_route_emulation.cpp
+++ b/test/unittests/test_route_emulation.cpp
@@ -161,7 +161,7 @@ TEST_F(RouteEmulationTest, ExcludeOneSubnet)
 
     doEmulate();
 
-    ASSERT_EQ(tb->routes.size(), 24);
+    ASSERT_EQ(tb->routes.size(), 24u);
 }
 
 TEST_F(RouteEmulationTest, ExcludeSubnetsNoDefault)
@@ -175,7 +175,7 @@ TEST_F(RouteEmulationTest, ExcludeSubnetsNoDefault)
 
     doEmulate();
 
-    ASSERT_EQ(tb->routes.size(), 1);
+    ASSERT_EQ(tb->routes.size(), 1u);
     ASSERT_EQ(tb->routes.at(0), "10.20.128.0/17");
 
     setup(true, false);
@@ -186,7 +186,7 @@ TEST_F(RouteEmulationTest, ExcludeSubnetsNoDefault)
 
     doEmulate();
 
-    ASSERT_EQ(tb->routes.size(), 1);
+    ASSERT_EQ(tb->routes.size(), 1u);
     ASSERT_EQ(tb->routes.at(0), "2500:1000::/33");
 }
 
@@ -196,7 +196,7 @@ TEST_F(RouteEmulationTest, excludeServer)
     emu->add_default_routes(true, true);
     doEmulate("1.2.3.4");
 
-    ASSERT_EQ(tb->routes.size(), 32);
+    ASSERT_EQ(tb->routes.size(), 32u);
     ASSERT_FALSE(tb->containsIP("1.2.3.4"));
     ASSERT_TRUE(tb->containsIP("1.2.3.5"));
     ASSERT_TRUE(tb->containsIP("1.2.3.3"));
@@ -206,7 +206,7 @@ TEST_F(RouteEmulationTest, excludeServer)
     emu->add_default_routes(true, true);
     doEmulate("::1.2.3.4");
 
-    ASSERT_EQ(tb->routes.size(), 128);
+    ASSERT_EQ(tb->routes.size(), 128u);
     ASSERT_FALSE(tb->containsIP("::1.2.3.4"));
     ASSERT_TRUE(tb->containsIP("::1.2.3.5"));
     ASSERT_TRUE(tb->containsIP("::1.2.3.3"));
@@ -278,7 +278,7 @@ TEST_F(RouteEmulationTest, DefaultRoute)
 
     doEmulate();
 
-    ASSERT_EQ(tb->routes.size(), 1);
+    ASSERT_EQ(tb->routes.size(), 1u);
     ASSERT_EQ(tb->routes.at(0), "0.0.0.0/0");
 
     // Now something more tricky add unnecessary extra route
@@ -289,8 +289,8 @@ TEST_F(RouteEmulationTest, DefaultRoute)
 
     doEmulate();
 
-    ASSERT_EQ(tb->routes.size(), 2);
+    ASSERT_EQ(tb->routes.size(), 2u);
     ASSERT_EQ(tb->routes.at(0), "0.0.0.0/0");
 }
 
-} // namespace unittests
\ No newline at end of file
+} // namespace unittests
diff --git a/test/unittests/test_time.cpp b/test/unittests/test_time.cpp
index 1c6dee80..fd82ae3d 100644
--- a/test/unittests/test_time.cpp
+++ b/test/unittests/test_time.cpp
@@ -119,9 +119,9 @@ static void sub(const Time &t1, const Time &t2, bool large)
     const Time::Duration d = t1 - t2;
     // std::cout << "T-T " << t1.raw() << " - " << t2.raw() << " = " << d.raw() << std::endl;
     if (large)
-        ASSERT_GE(d.raw(), 100000);
+        ASSERT_GE(d.raw(), 100000u);
     else
-        ASSERT_EQ(d.raw(), 0);
+        ASSERT_EQ(d.raw(), 0u);
 }
 
 static void sub(const Time::Duration &d1, const Time::Duration &d2)
diff --git a/test/unittests/test_typeindex.cpp b/test/unittests/test_typeindex.cpp
index c7eed693..cc06450f 100644
--- a/test/unittests/test_typeindex.cpp
+++ b/test/unittests/test_typeindex.cpp
@@ -143,7 +143,7 @@ TEST(typeindex, perf_test_fast)
             i = 0;
     }
     OPENVPN_LOG("PERF " << n_strings << '/' << N);
-    ASSERT_EQ(n_strings, 28571428);
+    ASSERT_EQ(n_strings, 28571428u);
 }
 
 // as a control, test performance of dynamic_cast
@@ -166,7 +166,7 @@ TEST(typeindex, perf_test_dynamic)
             i = 0;
     }
     OPENVPN_LOG("PERF " << n_strings << '/' << N);
-    ASSERT_EQ(n_strings, 28571428);
+    ASSERT_EQ(n_strings, 28571428u);
 }
 
 #endif
diff --git a/test/unittests/test_weak.cpp b/test/unittests/test_weak.cpp
index 0e1c898e..ff4dff87 100644
--- a/test/unittests/test_weak.cpp
+++ b/test/unittests/test_weak.cpp
@@ -196,7 +196,7 @@ void test()
     obj->vec.emplace_back(new Ref("Three", obj));
 
     // verify obj
-    ASSERT_EQ(obj->vec.size(), 3);
+    ASSERT_EQ(obj->vec.size(), 3u);
     ASSERT_EQ(obj->vec.at(0)->to_string(), "I am One whose parent is Regular Joe");
     ASSERT_EQ(obj->vec.at(1)->to_string(), "I am Two whose parent is Regular Joe");
     ASSERT_EQ(obj->vec.at(2)->to_string(), "I am Three whose parent is Regular Joe");