diff --git a/.gitignore b/.gitignore
index 46f42f8..3a500f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ install_manifest.txt
 compile_commands.json
 CTestTestfile.cmake
 _deps
+build
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d926ada..9eb1987 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,8 @@
-# FILEPATH: /C:/Users/green/source/repos/callbackDemo/c_library/CMakeLists.txt
-
-# Set the minimum version of CMake required to build the project
 cmake_minimum_required(VERSION 3.20)
 
 # Set the name of the project and the language it is written in
-project(C_Callback C)
+# CXX is included because we are using googletest.
+project(C_Callback C CXX)
 
 # create a shared library
 add_library(C_Callback SHARED)
@@ -14,3 +12,8 @@ target_include_directories(C_Callback PUBLIC include)
 
 # add the sources to the library
 target_sources(C_Callback PRIVATE src/C_Callback.c)
+
+# Add the tests
+include(CTest)
+add_subdirectory(tests)
+
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..f945ede
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.20)
+
+include(FetchContent)
+
+FetchContent_Declare(
+  googletest
+  GIT_REPOSITORY https://github.com/google/googletest.git
+  GIT_TAG        v1.14.0
+)
+
+FetchContent_MakeAvailable(googletest)
+
+add_executable(self_test self_test.cpp)
+target_link_libraries(self_test gtest_main)
+
+add_test(NAME self_test COMMAND self_test)
diff --git a/tests/self_test.cpp b/tests/self_test.cpp
new file mode 100644
index 0000000..06fd95c
--- /dev/null
+++ b/tests/self_test.cpp
@@ -0,0 +1,7 @@
+#include <gtest/gtest.h>
+
+TEST(SelfTest, Test1) {
+    EXPECT_EQ(1, 1);
+    EXPECT_TRUE(true);
+    EXPECT_FALSE(false);
+}
\ No newline at end of file