diff --git a/tests/replacetest.py b/tests/replacetest.py
new file mode 100644
index 00000000..3fc28db2
--- /dev/null
+++ b/tests/replacetest.py
@@ -0,0 +1,20 @@
+import unittest
+import pisi.replace
+import pisi.relation
+
+class ReplaceTestCase(unittest.TestCase):
+    def testInstalledPackageReplaced(self):
+        pisi.api.install(["ethtool"])
+        relation = pisi.relation.Relation()
+        relation.package = "ethtool"
+        relation.version = "6"
+        relation.release = "1"
+
+        replace = pisi.replace.Replace(relation)
+        replace.package = "zlib"
+        assert pisi.replace.installed_package_replaced(replace)
+        repinfo = pisi.replace.Replace(relation)
+        repinfo.package = "ctorrent"
+        assert not pisi.replace.installed_package_replaced(repinfo)
+
+        pisi.api.remove(["ethtool"])
diff --git a/tests/runtests.py b/tests/runtests.py
index 1e9ec769..f86f7904 100755
--- a/tests/runtests.py
+++ b/tests/runtests.py
@@ -24,6 +24,7 @@ from database.itembyrepotest import ItemByRepoTestCase
 from versiontest import VersionTestCase
 from mirrorstest import MirrorsTestCase
 from relationtest import RelationTestCase
+from replacetest import ReplaceTestCase
 
 suite = unittest.TestSuite()