diff --git a/.gitmodules b/.gitmodules
index 0c946a7..67e5376 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,9 +2,6 @@
 	path = third-party/doxyconfig
 	url = https://github.com/LizardByte/doxyconfig.git
 	branch = master
-[submodule "third-party/googletest"]
-	path = third-party/googletest
-	url = https://github.com/google/googletest.git
 [submodule "third-party/lizardbyte-common"]
 	path = third-party/lizardbyte-common
 	url = https://github.com/LizardByte/lizardbyte-common.git
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index f79f468..4802151 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -9,13 +9,19 @@ if(WIN32)
 endif()
 
 include(GoogleTest)
-add_subdirectory("${PROJECT_SOURCE_DIR}/third-party/googletest"
+add_subdirectory("${PROJECT_SOURCE_DIR}/third-party/lizardbyte-common/third-party/googletest"
                  "third-party/googletest")
 
+set(LIZARDBYTE_COMMON_BUILD_TEST_SUPPORT ON CACHE BOOL "Build lizardbyte-common GoogleTest support helpers" FORCE)
+if(NOT TARGET lizardbyte::common)
+    add_subdirectory("${PROJECT_SOURCE_DIR}/third-party/lizardbyte-common"
+                     "third-party/lizardbyte-common")
+elseif(NOT TARGET lizardbyte::test_support)
+    message(FATAL_ERROR "libvirtualhid tests require lizardbyte::test_support")
+endif()
 set(TEST_BINARY test_libvirtualhid)
 
 set(LIBVIRTUALHID_TEST_SOURCES
-  "${CMAKE_CURRENT_SOURCE_DIR}/fixtures/fixtures.cpp"
   "${CMAKE_CURRENT_SOURCE_DIR}/unit/test_gamepad_adapter.cpp"
   "${CMAKE_CURRENT_SOURCE_DIR}/unit/test_gamepad_lifecycle.cpp"
   "${CMAKE_CURRENT_SOURCE_DIR}/unit/test_linux_backend.cpp"
@@ -55,7 +61,8 @@ target_include_directories(${TEST_BINARY}
 target_link_libraries(${TEST_BINARY}
   PRIVATE
   gmock_main
-  libvirtualhid::libvirtualhid)
+  libvirtualhid::libvirtualhid
+  lizardbyte::test_support)
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
     target_link_libraries(${TEST_BINARY}
diff --git a/tests/fixtures/fixtures.cpp b/tests/fixtures/fixtures.cpp
deleted file mode 100644
index 75c8c55..0000000
--- a/tests/fixtures/fixtures.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-/**
- * @file tests/fixtures/fixtures.cpp
- * @brief Shared GoogleTest fixture setup definitions.
- */
-
-// standard includes
-#include <iostream>
-
-// platform includes
-#if defined(__linux__)
-  #include <unistd.h>
-#endif
-
-// local includes
-#include "fixtures/fixtures.hpp"
-
-void BaseTest::SetUp() {
-  cout_buffer_.str({});
-  cout_buffer_.clear();
-  cout_streambuf_ = std::cout.rdbuf();
-  std::cout.rdbuf(cout_buffer_.rdbuf());
-}
-
-void BaseTest::TearDown() {
-  if (cout_streambuf_ != nullptr) {
-    std::cout.rdbuf(cout_streambuf_);
-    cout_streambuf_ = nullptr;
-  }
-
-  const auto *test_info = ::testing::UnitTest::GetInstance()->current_test_info();
-  if (test_info != nullptr && test_info->result()->Failed()) {
-    std::cout << std::endl
-              << "Test failed: " << test_info->name() << std::endl
-              << std::endl
-              << "Captured cout:" << std::endl
-              << cout_buffer_.str() << std::endl;
-  }
-}
-
-#if !defined(__linux__)
-void LinuxTest::SetUp() {
-  GTEST_SKIP() << "Skipping, this test is for Linux only.";
-}
-#endif
-
-::testing::AssertionResult LinuxTest::HasReadableWritableDeviceNode(const char *path) {
-#if defined(__linux__)
-  if (::access(path, R_OK | W_OK) == 0) {
-    return ::testing::AssertionSuccess();
-  }
-
-  return ::testing::AssertionFailure() << path << " must be readable and writable";
-#else
-  static_cast<void>(path);
-  return ::testing::AssertionSuccess();
-#endif
-}
-
-#if !defined(__APPLE__) || !defined(__MACH__)
-void MacOSTest::SetUp() {
-  GTEST_SKIP() << "Skipping, this test is for macOS only.";
-}
-#endif
-
-#if !defined(_WIN32)
-void WindowsTest::SetUp() {
-  GTEST_SKIP() << "Skipping, this test is for Windows only.";
-}
-#endif
diff --git a/tests/fixtures/include/fixtures/fixtures.hpp b/tests/fixtures/include/fixtures/fixtures.hpp
index ac0a275..388e079 100644
--- a/tests/fixtures/include/fixtures/fixtures.hpp
+++ b/tests/fixtures/include/fixtures/fixtures.hpp
@@ -4,83 +4,5 @@
  */
 #pragma once
 
-// standard includes
-#include <sstream>
-#include <streambuf>
-
 // lib includes
-#include <gtest/gtest.h>
-
-/**
- * @brief Base class used by default for every test.
- */
-class BaseTest: public ::testing::Test {
-protected:
-  /**
-   * @brief Set up the test.
-   */
-  void SetUp() override;
-
-  /**
-   * @brief Tear down the test.
-   */
-  void TearDown() override;
-
-private:
-  std::stringstream cout_buffer_;
-  std::streambuf *cout_streambuf_ {nullptr};
-};
-
-/**
- * @brief Base class for Linux-only tests.
- */
-class LinuxTest: public BaseTest {
-protected:
-#if !defined(__linux__)
-  /**
-   * @brief Set up the test.
-   */
-  void SetUp() override;
-#endif
-
-  /**
-   * @brief Check that a Linux device node is readable and writable.
-   *
-   * @param path Device node path.
-   * @return GoogleTest assertion result.
-   */
-  static ::testing::AssertionResult HasReadableWritableDeviceNode(const char *path);
-};
-
-/**
- * @brief Base class for macOS-only tests.
- */
-class MacOSTest: public BaseTest {
-protected:
-#if !defined(__APPLE__) || !defined(__MACH__)
-  /**
-   * @brief Set up the test.
-   */
-  void SetUp() override;
-#endif
-};
-
-/**
- * @brief Base class for Windows-only tests.
- */
-class WindowsTest: public BaseTest {
-protected:
-#if !defined(_WIN32)
-  /**
-   * @brief Set up the test.
-   */
-  void SetUp() override;
-#endif
-};
-
-// Undefine the original TEST macro.
-#undef TEST  // NOSONAR(cpp:S959): Tests intentionally wrap TEST to use BaseTest.
-
-// Redefine TEST to automatically use the shared BaseTest fixture.
-#define TEST(test_case_name, test_name) \
-  GTEST_TEST_(test_case_name, test_name, ::BaseTest, ::testing::internal::GetTypeId<::BaseTest>())
+#include <lizardbyte/common/testing.h>
diff --git a/third-party/googletest b/third-party/googletest
deleted file mode 160000
index 52eb810..0000000
--- a/third-party/googletest
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 52eb8108c5bdec04579160ae17225d66034bd723
diff --git a/third-party/lizardbyte-common b/third-party/lizardbyte-common
index 8d7dcc9..d219f38 160000
--- a/third-party/lizardbyte-common
+++ b/third-party/lizardbyte-common
@@ -1 +1 @@
-Subproject commit 8d7dcc97d0795e4eb2efdb50a86f83060ed47934
+Subproject commit d219f38090db20119906c80860833592a6be669a