diff --git a/spring-core/src/main/java/org/springframework/core/env/PropertySourcesPropertyResolver.java b/spring-core/src/main/java/org/springframework/core/env/PropertySourcesPropertyResolver.java
index 5ab89cf902..b97fad8748 100644
--- a/spring-core/src/main/java/org/springframework/core/env/PropertySourcesPropertyResolver.java
+++ b/spring-core/src/main/java/org/springframework/core/env/PropertySourcesPropertyResolver.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -84,8 +84,8 @@ public class PropertySourcesPropertyResolver extends AbstractPropertyResolver {
 				}
 				Object value = propertySource.getProperty(key);
 				if (value != null) {
-					if (resolveNestedPlaceholders && value instanceof CharSequence cs) {
-						value = resolveNestedPlaceholders(cs.toString());
+					if (resolveNestedPlaceholders && value instanceof String string) {
+						value = resolveNestedPlaceholders(string);
 					}
 					logKeyFound(key, propertySource, value);
 					return convertValueIfNecessary(value, targetValueType);
diff --git a/spring-core/src/test/java/org/springframework/core/env/PropertySourcesPropertyResolverTests.java b/spring-core/src/test/java/org/springframework/core/env/PropertySourcesPropertyResolverTests.java
index a6344b1058..d442f6a0cb 100644
--- a/spring-core/src/test/java/org/springframework/core/env/PropertySourcesPropertyResolverTests.java
+++ b/spring-core/src/test/java/org/springframework/core/env/PropertySourcesPropertyResolverTests.java
@@ -300,19 +300,6 @@ class PropertySourcesPropertyResolverTests {
 			.withMessageContaining("Circular");
 	}
 
-	@Test
-	void resolveNestedPlaceholdersIfValueIsCharSequence() {
-		MutablePropertySources ps = new MutablePropertySources();
-		ps.addFirst(new MockPropertySource()
-				.withProperty("p1", "v1")
-				.withProperty("p2", "v2")
-				.withProperty("p3", new StringBuilder("${p1}:${p2}")));
-		ConfigurablePropertyResolver pr = new PropertySourcesPropertyResolver(ps);
-		assertThat(pr.getProperty("p1")).isEqualTo("v1");
-		assertThat(pr.getProperty("p2")).isEqualTo("v2");
-		assertThat(pr.getProperty("p3")).isEqualTo("v1:v2");
-	}
-
 	@Test
 	void ignoreUnresolvableNestedPlaceholdersIsConfigurable() {
 		MutablePropertySources ps = new MutablePropertySources();