diff --git a/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java b/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java
new file mode 100644
index 0000000000..b277ded6d8
--- /dev/null
+++ b/core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/percentile/CalculatePercentileUnitTest.java
@@ -0,0 +1,6 @@
+package com.baeldung.percentile;
+
+public class CalculatePercentileUnitTest {
+
+
+}
\ No newline at end of file
diff --git a/core-java-modules/pom.xml b/core-java-modules/pom.xml
index 3d26d51a6a..cf15b823bb 100644
--- a/core-java-modules/pom.xml
+++ b/core-java-modules/pom.xml
@@ -144,6 +144,7 @@
         <module>core-java-lang-6</module>
         <module>core-java-lang-math</module>
         <module>core-java-lang-math-2</module>
+        <module>core-java-lang-math-4</module>
         <module>core-java-lang-oop-constructors</module>
         <module>core-java-lang-oop-patterns</module>
         <module>core-java-lang-oop-generics</module>