2 files changed, 2 insertions, 2 deletions
diff --git a/build/src/test/java/org/aspectj/internal/build/BuildModuleTest.java b/build/src/test/java/org/aspectj/internal/build/BuildModuleTest.java
index f8f0b4bde..b8a6c6d15 100644
--- a/build/src/test/java/org/aspectj/internal/build/BuildModuleTest.java
+++ b/build/src/test/java/org/aspectj/internal/build/BuildModuleTest.java
@@ -107,7 +107,7 @@ public class BuildModuleTest extends TestCase {
 			if (!Util.delete(file)) {
 				File[] list = file.listFiles();
 				if (!Util.isEmpty(list)) {
-					StringBuffer sb = new StringBuffer();
+					StringBuilder sb = new StringBuilder();
 					sb.append("warning: BuildModuleTest unable to delete ");
 					sb.append(file.toString());
 					sb.append("\n"); // XXX platform
diff --git a/build/src/test/java/org/aspectj/internal/build/ModulesTest.java b/build/src/test/java/org/aspectj/internal/build/ModulesTest.java
index 52f6f48dc..5b1692570 100644
--- a/build/src/test/java/org/aspectj/internal/build/ModulesTest.java
+++ b/build/src/test/java/org/aspectj/internal/build/ModulesTest.java
@@ -115,7 +115,7 @@ public class ModulesTest extends TestCase {
             }
         }
         if (!badModules.isEmpty()) {
-            StringBuffer sb = new StringBuffer();
+            StringBuilder sb = new StringBuilder();
             for (Module module: badModules) {
                 System.err.println(module.toLongString());
                 sb.append("\n");