diff --git a/tycho-its/src/test/java/org/eclipse/tycho/test/util/HttpServer.java b/tycho-its/src/test/java/org/eclipse/tycho/test/util/HttpServer.java
index 175305c15d..d22a54bb3f 100644
--- a/tycho-its/src/test/java/org/eclipse/tycho/test/util/HttpServer.java
+++ b/tycho-its/src/test/java/org/eclipse/tycho/test/util/HttpServer.java
@@ -14,6 +14,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Collections;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
@@ -199,7 +200,7 @@ public String getUrl(String contextName) {
 
 	public List<String> getAccessedUrls(String contextName) {
 		synchronized (contextName2accessedUrls) {
-			return List.copyOf(contextName2accessedUrls.get(contextName));
+			return List.copyOf(contextName2accessedUrls.getOrDefault(contextName, Collections.emptyList()));
 		}
 	}