diff --git a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/artifact/repository/ArtifactRepositoryManagerTest.java b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/artifact/repository/ArtifactRepositoryManagerTest.java
index 0d0b55a..21b5f1c 100644
--- a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/artifact/repository/ArtifactRepositoryManagerTest.java
+++ b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/artifact/repository/ArtifactRepositoryManagerTest.java
@@ -186,6 +186,9 @@
 		assertTrue("2.0", manager.contains(location));
 		assertFalse("2.1", manager.isEnabled(location));
 		assertEquals("2.2", "MyNick", manager.getRepositoryProperty(location, IRepository.PROP_NICKNAME));
+
+		// Set it back to null for other tests
+		manager.setRepositoryProperty(location, IRepository.PROP_NICKNAME, null);
 	}
 
 	/**
diff --git a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/repository/MetadataRepositoryManagerTest.java b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/repository/MetadataRepositoryManagerTest.java
index 93a0bd5..9da7f80 100644
--- a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/repository/MetadataRepositoryManagerTest.java
+++ b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/repository/MetadataRepositoryManagerTest.java
@@ -458,6 +458,9 @@
 		assertTrue("2.0", manager.contains(location));
 		assertFalse("2.1", manager.isEnabled(location));
 		assertEquals("2.2", "MyNick", manager.getRepositoryProperty(location, IRepository.PROP_NICKNAME));
+
+		// Set the nickname back to null for other tests
+		manager.setRepositoryProperty(location, IRepository.PROP_NICKNAME, null);
 	}
 
 	/**