diff --git a/Test/CMakeLists.txt b/Test/CMakeLists.txt
index 63acf97..b01345c 100644
--- a/Test/CMakeLists.txt
+++ b/Test/CMakeLists.txt
@@ -10,6 +10,8 @@ add_executable(Tests
         Catch2.h
         main.cpp
         Math__Mod.cpp
+        Math__Oscillate.cpp
+        Math__Abs.cpp
 )
 
 target_link_libraries(Tests Eule)
diff --git a/Test/Math__Abs.cpp b/Test/Math__Abs.cpp
new file mode 100644
index 0000000..ae9788d
--- /dev/null
+++ b/Test/Math__Abs.cpp
@@ -0,0 +1,31 @@
+#include "Catch2.h"
+#include <Eule/Math.h>
+
+using namespace Eule;
+
+/** Equivalence classes:
+*		-- value > 0
+*		-- value < 0
+*		-- value == 0
+*/
+
+// Checks with a positive input
+TEST_CASE("Positive_Value", "[Math][Abs]")
+{
+    REQUIRE(Math::Abs(45.0) == 45.0);
+    return;
+}
+
+// Checks with a negative input
+TEST_CASE("Negative_Value", "[Math][Abs]")
+{
+    REQUIRE(Math::Abs(-45.0) == 45);
+    return;
+}
+
+// Checks with a zero input
+TEST_CASE("Zero_Value", "[Math][Abs]")
+{
+    REQUIRE(Math::Abs(0.0) == 0.0);
+    return;
+}