Bug 572831 - testBug196754 fails on 20210410-0630 and beyond 

Change-Id: Id8199f1f6e73216188fcb081e809a170c137432f
Signed-off-by: Vikas Chandra <Vikas.Chandra@in.ibm.com>
diff --git a/org.eclipse.pde.build.tests/src/org/eclipse/pde/build/internal/tests/AssembleTests.java b/org.eclipse.pde.build.tests/src/org/eclipse/pde/build/internal/tests/AssembleTests.java
index 3e1a975..48568a5 100644
--- a/org.eclipse.pde.build.tests/src/org/eclipse/pde/build/internal/tests/AssembleTests.java
+++ b/org.eclipse.pde.build.tests/src/org/eclipse/pde/build/internal/tests/AssembleTests.java
@@ -129,6 +129,8 @@
 
 		Properties buildProperties = BuildConfiguration.getBuilderProperties(buildFolder);
 		buildProperties.put("archivesFormat", "*, *, * - folder");
+		buildProperties.put("jarProcessor.unsign", "true");
+		buildProperties.put("signJars", "true");
 		if (!executable.equals(new File((String) buildProperties.get("baseLocation"))))
 			buildProperties.put("pluginPath", executable.getAbsolutePath());
 		Utils.storeBuildProperties(buildFolder, buildProperties);