diff --git a/host-cache/src/test/groovy/com/muwire/hostcache/CrawlerTest.groovy b/host-cache/src/test/groovy/com/muwire/hostcache/CrawlerTest.groovy
new file mode 100644
index 00000000..7298db32
--- /dev/null
+++ b/host-cache/src/test/groovy/com/muwire/hostcache/CrawlerTest.groovy
@@ -0,0 +1,37 @@
+package com.muwire.hostcache
+
+import org.junit.Before
+import org.junit.Test
+
+import groovy.mock.interceptor.MockFor
+import groovy.mock.interceptor.StubFor
+import net.i2p.data.Destination
+
+class CrawlerTest {
+
+	def pingerMock
+	def pinger
+	
+	def hostPoolMock
+	def hostPool
+	
+	def crawler
+	
+	@Before
+	void before() {
+		pingerMock = new MockFor(Pinger)
+		pinger = pingerMock.proxyInstance()
+		
+		hostPoolMock = new MockFor(HostPool)
+		hostPool = hostPoolMock.proxyInstance()
+		
+		crawler = new Crawler(pinger, hostPool)
+	}
+	
+	@Test
+	void testBadJson() {
+		def unpingedHost = new Host(destination : new Destination())
+		crawler.handleCrawlerPong(null, new Destination())
+		hostPoolMock.verify hostPool
+	}
+}