diff --git a/src/test/java/src/TasksFrameTest.java b/src/test/java/src/TasksFrameTest.java
index 26872fc..e1b47cc 100644
--- a/src/test/java/src/TasksFrameTest.java
+++ b/src/test/java/src/TasksFrameTest.java
@@ -169,6 +169,17 @@ class TasksFrameTest {
         double c = tasksFrame.bmi(1.24, 30);
         assertEquals(19.51, c);
     }
+
+    @Test
+    void test_expo(){
+        TasksFrame tasksFrame = new TasksFrame();
+        double a = tasksFrame.expo(2, 3);
+        assertEquals(8, a);
+        double b = tasksFrame.expo(15, 3);
+        assertEquals(3375, b);
+        double c = tasksFrame.expo(10, 0);
+        assertEquals(1, c);
+    }
 }