diff --git a/java-strings-2/src/test/java/com/baeldung/string/changecase/ToLowerCaseUnitTest.java b/java-strings-2/src/test/java/com/baeldung/string/changecase/ToLowerCaseUnitTest.java
index 14102be993..c395b61068 100644
--- a/java-strings-2/src/test/java/com/baeldung/string/changecase/ToLowerCaseUnitTest.java
+++ b/java-strings-2/src/test/java/com/baeldung/string/changecase/ToLowerCaseUnitTest.java
@@ -7,23 +7,23 @@ import java.util.Locale;
 import org.junit.Test;
 
 public class ToLowerCaseUnitTest {
-	
-	private static final Locale TURKISH = new Locale("tr");
-	private String name = "John Doe";
-	private String foreignUppercase = "\u0049";
 
-	@Test
-	public void givenMixedCaseString_WhenToLowerCase_ThenResultIsLowerCase() {
-		assertEquals("john doe", name.toLowerCase());
-	}
-	
-	@Test
-	public void givenForeignString_WhenToLowerCaseWithoutLocale_ThenResultIsLowerCase() {
-		assertEquals("\u0069", foreignUppercase.toLowerCase());
-	}
-	
-	@Test
-	public void givenForeignString_WhenToLowerCaseWithLocale_ThenResultIsLowerCase() {
-		assertEquals("\u0131", foreignUppercase.toLowerCase(TURKISH));
-	}
+    private static final Locale TURKISH = new Locale("tr");
+    private String name = "John Doe";
+    private String foreignUppercase = "\u0049";
+
+    @Test
+    public void givenMixedCaseString_WhenToLowerCase_ThenResultIsLowerCase() {
+        assertEquals("john doe", name.toLowerCase());
+    }
+
+    @Test
+    public void givenForeignString_WhenToLowerCaseWithoutLocale_ThenResultIsLowerCase() {
+        assertEquals("\u0069", foreignUppercase.toLowerCase());
+    }
+
+    @Test
+    public void givenForeignString_WhenToLowerCaseWithLocale_ThenResultIsLowerCase() {
+        assertEquals("\u0131", foreignUppercase.toLowerCase(TURKISH));
+    }
 }
diff --git a/java-strings-2/src/test/java/com/baeldung/string/changecase/ToUpperCaseUnitTest.java b/java-strings-2/src/test/java/com/baeldung/string/changecase/ToUpperCaseUnitTest.java
index 90b80714a7..365b5ae52f 100644
--- a/java-strings-2/src/test/java/com/baeldung/string/changecase/ToUpperCaseUnitTest.java
+++ b/java-strings-2/src/test/java/com/baeldung/string/changecase/ToUpperCaseUnitTest.java
@@ -8,22 +8,22 @@ import org.junit.Test;
 
 public class ToUpperCaseUnitTest {
 
-	private static final Locale TURKISH = new Locale("tr");
-	private String name = "John Doe";
-	private String foreignUppercase = "\u0069";
+    private static final Locale TURKISH = new Locale("tr");
+    private String name = "John Doe";
+    private String foreignUppercase = "\u0069";
 
-	@Test
-	public void givenMixedCaseString_WhenToUpperCase_ThenResultIsUpperCase() {
-		assertEquals("JOHN DOE", name.toUpperCase());
-	}
-	
-	@Test
-	public void givenForeignString_WhenToUpperCaseWithoutLocale_ThenResultIsUpperCase() {
-		assertEquals("\u0049", foreignUppercase.toUpperCase());
-	}
-	
-	@Test
-	public void givenForeignString_WhenToUpperCaseWithLocale_ThenResultIsUpperCase() {
-		assertEquals("\u0130", foreignUppercase.toUpperCase(TURKISH));
-	}
+    @Test
+    public void givenMixedCaseString_WhenToUpperCase_ThenResultIsUpperCase() {
+        assertEquals("JOHN DOE", name.toUpperCase());
+    }
+
+    @Test
+    public void givenForeignString_WhenToUpperCaseWithoutLocale_ThenResultIsUpperCase() {
+        assertEquals("\u0049", foreignUppercase.toUpperCase());
+    }
+
+    @Test
+    public void givenForeignString_WhenToUpperCaseWithLocale_ThenResultIsUpperCase() {
+        assertEquals("\u0130", foreignUppercase.toUpperCase(TURKISH));
+    }
 }