diff --git a/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/MockSystemReader.java b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/MockSystemReader.java
index 4dbfc59ec..419fdb196 100644
--- a/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/MockSystemReader.java
+++ b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/MockSystemReader.java
@@ -302,7 +302,7 @@ private void resetOsNames() {
 			field.setAccessible(true);
 			field.set(null, null);
 		} catch (Exception e) {
-			e.printStackTrace();
+			throw new RuntimeException(e);
 		}
 	}