diff --git a/src/test/java/org/springframework/samples/petclinic/PostgresIntegrationTests.java b/src/test/java/org/springframework/samples/petclinic/PostgresIntegrationTests.java
index 82e7a6a87c6..87d98113ee7 100644
--- a/src/test/java/org/springframework/samples/petclinic/PostgresIntegrationTests.java
+++ b/src/test/java/org/springframework/samples/petclinic/PostgresIntegrationTests.java
@@ -117,14 +117,14 @@ public void printProperties() {
 					String resolved = environment.getProperty(name);
 
 					if (resolved == null) {
-						fail("resolved property named {0} was expecting a string but is null.", name);
+						fail("resolved property named {%s} was expecting a string but is null.", name);
 						return;
 					}
 
 					Object sourceProperty = source.getProperty(name);
 
 					if (sourceProperty == null || sourceProperty.toString() == null) {
-						fail("source property named {0} was expecting a string value but is null.", name);
+						fail("source property named {%s} was expecting a string but is null.", name);
 						return;
 					}