diff --git a/openj9.stf.extensions/build.xml b/openj9.stf.extensions/build.xml
index 3287875..6fd00a6 100644
--- a/openj9.stf.extensions/build.xml
+++ b/openj9.stf.extensions/build.xml
@@ -95,7 +95,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-excepti
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-			   encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<compilerarg value="-Xlint:deprecation,unchecked" />
diff --git a/openj9.test.daa/build.xml b/openj9.test.daa/build.xml
index 30aca3e..86ccef4 100644
--- a/openj9.test.daa/build.xml
+++ b/openj9.test.daa/build.xml
@@ -96,7 +96,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-excepti
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-		       encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<include name="**/*.java"/>
diff --git a/openj9.test.jlm/build.xml b/openj9.test.jlm/build.xml
index ed8b157..230df5f 100644
--- a/openj9.test.jlm/build.xml
+++ b/openj9.test.jlm/build.xml
@@ -99,7 +99,7 @@
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-			   encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<include name="**/*.java"/>
diff --git a/openj9.test.load/build.xml b/openj9.test.load/build.xml
index 9a0878a..69631d6 100644
--- a/openj9.test.load/build.xml
+++ b/openj9.test.load/build.xml
@@ -89,7 +89,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-excepti
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-			   encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<include name="**/*.java"/>
diff --git a/openj9.test.sharedClasses.jvmti/build.xml b/openj9.test.sharedClasses.jvmti/build.xml
index 49e7b5f..eb09c8d 100644
--- a/openj9.test.sharedClasses.jvmti/build.xml
+++ b/openj9.test.sharedClasses.jvmti/build.xml
@@ -129,7 +129,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-excepti
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-			   encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<compilerarg value="-Xlint:deprecation,unchecked" />
diff --git a/openj9.test.sharedClasses/build.xml b/openj9.test.sharedClasses/build.xml
index ffd2115..788d4c7 100644
--- a/openj9.test.sharedClasses/build.xml
+++ b/openj9.test.sharedClasses/build.xml
@@ -99,7 +99,7 @@ SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-excepti
 			   executable="${java_compiler}"
 			   debug="true"
 			   classpathref="project.class.path"
-			   encoding="${src-encoding}"
+			   encoding="ISO-8859-1"
 			   includeantruntime="false"
 			   failonerror="true">
 			<compilerarg value="-Xlint:deprecation,unchecked" />