diff --git a/spring-cloud-config-client-tls-tests/src/test/java/org/springframework/cloud/config/client/TlsConfigClientRunner.java b/spring-cloud-config-client-tls-tests/src/test/java/org/springframework/cloud/config/client/TlsConfigClientRunner.java
index d5ea3f88..feca9aae 100644
--- a/spring-cloud-config-client-tls-tests/src/test/java/org/springframework/cloud/config/client/TlsConfigClientRunner.java
+++ b/spring-cloud-config-client-tls-tests/src/test/java/org/springframework/cloud/config/client/TlsConfigClientRunner.java
@@ -25,6 +25,7 @@ public class TlsConfigClientRunner extends AppRunner {
 
 		property("spring.cloud.config.uri", server.root());
 		property("spring.cloud.config.enabled", "true");
+		property("spring.config.use-legacy-processing", "true");
 	}
 
 	public void enableTls() {