diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 7afc05ee..f48ccb07 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -20,6 +20,12 @@ target_link_libraries(neotests PRIVATE
     tomlplusplus::tomlplusplus
 )
 
+# # NOTE: Add `-Wno-maybe-uninitialized` for g++ because g++ doesn't work well
+# # with Catch2 macros. Consider removing this if later switching to googletest.
+# if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+#     target_compile_options(neotests PRIVATE -Wno-maybe-uninitialized)
+# endif()
+
 # target_link_libraries(main PRIVATE GTest::gtest GTest::gtest_main GTest::gmock GTest::gmock_main)
 
 # add_custom_target(neotests-setcap ALL
diff --git a/tests/driver/docker.cpp b/tests/driver/docker.cpp
index be374813..89cdc1f6 100644
--- a/tests/driver/docker.cpp
+++ b/tests/driver/docker.cpp
@@ -79,8 +79,8 @@ TEST_CASE("docker") {
         mutex mtx;             // lock for recv_pkts
         condition_variable cv; // for reading recv_pkts
         unique_lock<mutex> lck(mtx);
-        Interface *eth0;
-        Interface *eth1;
+        Interface *eth0 = nullptr;
+        Interface *eth1 = nullptr;
         REQUIRE_NOTHROW(eth0 = node->get_intfs().at("eth0"));
         REQUIRE_NOTHROW(eth1 = node->get_intfs().at("eth1"));
 
diff --git a/tests/dropmon.cpp b/tests/dropmon.cpp
index 7b44ab5e..fb58a259 100644
--- a/tests/dropmon.cpp
+++ b/tests/dropmon.cpp
@@ -24,11 +24,11 @@ TEST_CASE("dropmon") {
     const string inputfn = test_data_dir + "/docker-drop.toml";
     REQUIRE_NOTHROW(ConfigParser().parse(inputfn, plankton));
     const auto &network = plankton.network();
-    DockerNode *node;
+    DockerNode *node = nullptr;
     REQUIRE_NOTHROW(node = static_cast<DockerNode *>(network.nodes().at("fw")));
     REQUIRE(node);
-    Interface *eth0;
-    Interface *eth1;
+    Interface *eth0 = nullptr;
+    Interface *eth1 = nullptr;
     REQUIRE_NOTHROW(eth0 = node->get_intfs().at("eth0"));
     REQUIRE_NOTHROW(eth1 = node->get_intfs().at("eth1"));
     REQUIRE(eth0);
@@ -85,11 +85,11 @@ TEST_CASE("dropmon") {
         REQUIRE_NOTHROW(dm.start_listening_for(pkt, &docker));
         // Send the ping packet
         REQUIRE_NOTHROW(docker.unpause());
-        size_t nwrite;
+        size_t nwrite = 0;
         REQUIRE_NOTHROW(nwrite = docker.inject_packet(pkt));
         CHECK(nwrite == 42);
         // Get the kernel drop timestamp (blocking)
-        uint64_t drop_ts;
+        uint64_t drop_ts = 0;
         REQUIRE_NOTHROW(drop_ts = dm.get_drop_ts(timeout));
         CHECK(drop_ts > 0);
         REQUIRE_NOTHROW(docker.pause());
@@ -186,7 +186,7 @@ TEST_CASE("dropmon") {
         REQUIRE_NOTHROW(start_dm_thread());
         // Send the ping packet
         REQUIRE_NOTHROW(docker.unpause());
-        size_t nwrite;
+        size_t nwrite = 0;
         REQUIRE_NOTHROW(nwrite = docker.inject_packet(pkt));
         CHECK(nwrite == 42);
         // Get the kernel drop timestamp (blocking)
diff --git a/tests/droptrace.cpp b/tests/droptrace.cpp
index 22a09870..f115bab0 100644
--- a/tests/droptrace.cpp
+++ b/tests/droptrace.cpp
@@ -25,11 +25,11 @@ TEST_CASE("droptrace") {
     const string inputfn = test_data_dir + "/docker-drop.toml";
     REQUIRE_NOTHROW(ConfigParser().parse(inputfn, plankton));
     const auto &network = plankton.network();
-    DockerNode *node;
+    DockerNode *node = nullptr;
     REQUIRE_NOTHROW(node = static_cast<DockerNode *>(network.nodes().at("fw")));
     REQUIRE(node);
-    Interface *eth0;
-    Interface *eth1;
+    Interface *eth0 = nullptr;
+    Interface *eth1 = nullptr;
     REQUIRE_NOTHROW(eth0 = node->get_intfs().at("eth0"));
     REQUIRE_NOTHROW(eth1 = node->get_intfs().at("eth1"));
     REQUIRE(eth0);
@@ -84,8 +84,8 @@ TEST_CASE("droptrace") {
         REQUIRE_NOTHROW(dt.start()); // Open and load the BPF program
 
         Packet pkt;
-        size_t nwrite;
-        uint64_t drop_ts;
+        size_t nwrite = 0;
+        uint64_t drop_ts = 0;
 
         // Ping request packet from node1 to node2
         pkt = Packet(eth0, "192.168.1.2", "192.168.2.2", 0, 0, 0, 0,
@@ -207,7 +207,7 @@ TEST_CASE("droptrace") {
         };
 
         Packet pkt;
-        size_t nwrite;
+        size_t nwrite = 0;
 
         // Ping request packet from node1 to node2
         pkt = Packet(eth0, "192.168.1.2", "192.168.2.2", 0, 0, 0, 0,