diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4643c66..8998504 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,8 +20,10 @@ enable_testing()
 
 add_executable(
  VectorAlgebraTest
- "test/hello_test.cc"
- "test/Vector3_test.cc")
+ #"test/hello_test.cc"
+ "test/Vector3_test.cc"
+ "test/Quaternion_test.cc"
+ )
 target_link_libraries(
  VectorAlgebraTest
  gtest_main
diff --git a/src/Vector3.cpp b/src/Vector3.cpp
index 304266c..b0a177d 100644
--- a/src/Vector3.cpp
+++ b/src/Vector3.cpp
@@ -60,7 +60,6 @@ Vector3 Vector3::Normalize(Vector3 v) {
 	}
 	return result;
 }
-
 Vector3 Vector3::normalized() const {
 	float num = this->magnitude();
 	Vector3 result = Vector3::zero;
@@ -81,6 +80,7 @@ Vector3 Vector3::operator -() {
 Vector3 Vector3::operator +(const Vector3& v2) const {
 	return Vector3(this->x + v2.x, this->y + v2.y, this->z + v2.z);
 }
+
 Vector3 Vector3::Scale(const Vector3& p1, const Vector3& p2) {
 	return Vector3(p1.x * p2.x, p1.y * p2.y, p1.z * p2.z);
 }
diff --git a/test/Quaternion_test.cc b/test/Quaternion_test.cc
new file mode 100644
index 0000000..a1e301f
--- /dev/null
+++ b/test/Quaternion_test.cc
@@ -0,0 +1,23 @@
+#include <gtest/gtest.h>
+#include <math.h>
+#include <limits>
+
+#include "Quaternion.h"
+
+#define FLOAT_INFINITY std::numeric_limits<float>::infinity()
+
+TEST(Quaternion, Normalze) {
+	bool r = false;
+
+	Quaternion q1 = Quaternion(0, 0, 0, 1);
+	Quaternion q = Quaternion::identity;
+
+	q = q1;
+	q.Normalize();
+	r = q == q1;
+	EXPECT_TRUE(r) << "q.Normalzed 0 0 0 1";
+
+	q = Quaternion::Normalize(q1);
+	r = q == q1;
+	EXPECT_TRUE(r) << "Quaternion::Normalize 0 0 0 1";
+}
\ No newline at end of file
diff --git a/test/Vector3_test.cc b/test/Vector3_test.cc
index 7d5ee81..3545a32 100644
--- a/test/Vector3_test.cc
+++ b/test/Vector3_test.cc
@@ -1,6 +1,7 @@
 #include <gtest/gtest.h>
 #include <math.h>
 #include <limits>
+
 #include "Vector3.h"
 
 #define FLOAT_INFINITY std::numeric_limits<float>::infinity()