diff --git a/src/test/java/com_github_leetcode/CommonUtils.java b/src/test/java/com_github_leetcode/CommonUtils.java
index 0705ee51e..551c5f036 100644
--- a/src/test/java/com_github_leetcode/CommonUtils.java
+++ b/src/test/java/com_github_leetcode/CommonUtils.java
@@ -6,20 +6,6 @@
 
 public class CommonUtils {
 
-    public static void printArray(int[] nums) {
-        for (int i : nums) {
-            System.out.print(i + ", ");
-        }
-        System.out.println();
-    }
-
-    public static void printArray(double[] nums) {
-        for (double i : nums) {
-            System.out.print(i + ", ");
-        }
-        System.out.println();
-    }
-
     public static boolean compareArray(int[] arr1, int[] arr2) {
         for (int i : arr1) {
             boolean include = false;
diff --git a/src/test/java/g0401_0500/s0478_generate_random_point_in_a_circle/SolutionTest.java b/src/test/java/g0401_0500/s0478_generate_random_point_in_a_circle/SolutionTest.java
index 0eab9f55d..9a7ec84a4 100644
--- a/src/test/java/g0401_0500/s0478_generate_random_point_in_a_circle/SolutionTest.java
+++ b/src/test/java/g0401_0500/s0478_generate_random_point_in_a_circle/SolutionTest.java
@@ -3,16 +3,15 @@
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-import com_github_leetcode.CommonUtils;
 import org.junit.jupiter.api.Test;
 
 class SolutionTest {
     @Test
     void randPoint() {
         Solution solution = new Solution(1.0, 0.0, 0.0);
-        CommonUtils.printArray(solution.randPoint());
-        CommonUtils.printArray(solution.randPoint());
-        CommonUtils.printArray(solution.randPoint());
+        solution.randPoint();
+        solution.randPoint();
+        solution.randPoint();
         assertThat(solution, equalTo(solution));
     }
 }
diff --git a/src/test/java/g0401_0500/s0497_random_point_in_non_overlapping_rectangles/SolutionTest.java b/src/test/java/g0401_0500/s0497_random_point_in_non_overlapping_rectangles/SolutionTest.java
index bf75651df..71182eaf8 100644
--- a/src/test/java/g0401_0500/s0497_random_point_in_non_overlapping_rectangles/SolutionTest.java
+++ b/src/test/java/g0401_0500/s0497_random_point_in_non_overlapping_rectangles/SolutionTest.java
@@ -3,18 +3,17 @@
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-import com_github_leetcode.CommonUtils;
 import org.junit.jupiter.api.Test;
 
 class SolutionTest {
     @Test
     void solutionTest() {
         Solution solution = new Solution(new int[][] {{-2, -2, 1, 1}, {2, 2, 4, 6}});
-        CommonUtils.printArray(solution.pick());
-        CommonUtils.printArray(solution.pick());
-        CommonUtils.printArray(solution.pick());
-        CommonUtils.printArray(solution.pick());
-        CommonUtils.printArray(solution.pick());
+        solution.pick();
+        solution.pick();
+        solution.pick();
+        solution.pick();
+        solution.pick();
         assertThat(true, equalTo(true));
     }
 }
diff --git a/src/test/java/g0501_0600/s0519_random_flip_matrix/SolutionTest.java b/src/test/java/g0501_0600/s0519_random_flip_matrix/SolutionTest.java
index 72162e695..9cb194b93 100644
--- a/src/test/java/g0501_0600/s0519_random_flip_matrix/SolutionTest.java
+++ b/src/test/java/g0501_0600/s0519_random_flip_matrix/SolutionTest.java
@@ -3,18 +3,17 @@
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-import com_github_leetcode.CommonUtils;
 import org.junit.jupiter.api.Test;
 
 class SolutionTest {
     @Test
     void solutionTest() {
         Solution solution = new Solution(3, 1);
-        CommonUtils.printArray(solution.flip());
-        CommonUtils.printArray(solution.flip());
-        CommonUtils.printArray(solution.flip());
+        solution.flip();
+        solution.flip();
+        solution.flip();
         solution.reset();
-        CommonUtils.printArray(solution.flip());
+        solution.flip();
         assertThat(true, equalTo(true));
     }
 }