diff --git a/scripts/unit-test.py b/scripts/unit-test.py
index c6dc14c..ca0868d 100755
--- a/scripts/unit-test.py
+++ b/scripts/unit-test.py
@@ -944,14 +944,17 @@
         system.build()
         system.install()
 
-    def test(self):
-        system = self.build_system()
+    def _test_one(self, system):
         system.configure(True)
         system.build()
         system.install()
         system.test()
         system.analyze()
 
+    def test(self):
+        for system in self.build_systems():
+            self._test_one(system)
+
 
 def find_file(filename, basedir):
     """