diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/MethodValidationTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/MethodValidationTests.java
index f678629f16..45be68d4d9 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/MethodValidationTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/MethodValidationTests.java
@@ -20,6 +20,7 @@ import java.lang.reflect.Method;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 import java.util.function.Consumer;
 
@@ -29,10 +30,12 @@ import jakarta.validation.Valid;
 import jakarta.validation.constraints.Size;
 import jakarta.validation.executable.ExecutableValidator;
 import jakarta.validation.metadata.BeanDescriptor;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.context.MessageSourceResolvable;
+import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.StringHttpMessageConverter;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
@@ -92,6 +95,8 @@ class MethodValidationTests {
 
 	@BeforeEach
 	void setup() throws Exception {
+		LocaleContextHolder.setDefaultLocale(Locale.UK);
+
 		LocalValidatorFactoryBean validatorBean = new LocalValidatorFactoryBean();
 		validatorBean.afterPropertiesSet();
 		this.jakartaValidator = new InvocationCountingValidator(validatorBean);
@@ -121,6 +126,11 @@ class MethodValidationTests {
 		return handlerAdapter;
 	}
 
+	@AfterEach
+	void reset() {
+		LocaleContextHolder.setDefaultLocale(null);
+	}
+
 
 	@Test
 	void modelAttribute() {
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/tags/EvalTagTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/tags/EvalTagTests.java
index 400f92abcf..ad5608f043 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/tags/EvalTagTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/tags/EvalTagTests.java
@@ -22,14 +22,15 @@ import java.util.Locale;
 import java.util.Map;
 
 import jakarta.servlet.jsp.tagext.Tag;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.context.support.GenericApplicationContext;
 import org.springframework.core.env.MapPropertySource;
 import org.springframework.format.annotation.NumberFormat;
 import org.springframework.format.annotation.NumberFormat.Style;
-import org.springframework.format.number.PercentStyleFormatter;
 import org.springframework.format.support.FormattingConversionServiceFactoryBean;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.testfixture.servlet.MockHttpServletResponse;
@@ -49,6 +50,8 @@ class EvalTagTests extends AbstractTagTests {
 
 	@BeforeEach
 	void setup() {
+		LocaleContextHolder.setDefaultLocale(Locale.UK);
+
 		context = createPageContext();
 		FormattingConversionServiceFactoryBean factory = new FormattingConversionServiceFactoryBean();
 		factory.afterPropertiesSet();
@@ -58,6 +61,11 @@ class EvalTagTests extends AbstractTagTests {
 		tag.setPageContext(context);
 	}
 
+	@AfterEach
+	void reset() {
+		LocaleContextHolder.setDefaultLocale(null);
+	}
+
 
 	@Test
 	void printScopedAttributeResult() throws Exception {
@@ -81,13 +89,12 @@ class EvalTagTests extends AbstractTagTests {
 
 	@Test
 	void printFormattedScopedAttributeResult() throws Exception {
-		PercentStyleFormatter formatter = new PercentStyleFormatter();
 		tag.setExpression("bean.formattable");
 		int action = tag.doStartTag();
 		assertThat(action).isEqualTo(Tag.EVAL_BODY_INCLUDE);
 		action = tag.doEndTag();
 		assertThat(action).isEqualTo(Tag.EVAL_PAGE);
-		assertThat(((MockHttpServletResponse) context.getResponse()).getContentAsString()).isEqualTo(formatter.print(new BigDecimal(".25"), Locale.getDefault()));
+		assertThat(((MockHttpServletResponse) context.getResponse()).getContentAsString()).isEqualTo("25%");
 	}
 
 	@Test