diff --git a/infer/lib/java/android/BUCK b/infer/lib/java/android/BUCK
index 9a16e5377..29d842686 100644
--- a/infer/lib/java/android/BUCK
+++ b/infer/lib/java/android/BUCK
@@ -1,6 +1,6 @@
 prebuilt_jar(
     name = 'android',
-    binary_jar = 'android-19.jar',
+    binary_jar = 'android-23.jar',
     visibility = [
         'PUBLIC'
     ]
diff --git a/infer/lib/java/android/android-19.jar b/infer/lib/java/android/android-23.jar
similarity index 56%
rename from infer/lib/java/android/android-19.jar
rename to infer/lib/java/android/android-23.jar
index b9aada2db..3e2434de4 100644
Binary files a/infer/lib/java/android/android-19.jar and b/infer/lib/java/android/android-23.jar differ
diff --git a/infer/models/java/Makefile b/infer/models/java/Makefile
index 7221e4db5..50f336720 100644
--- a/infer/models/java/Makefile
+++ b/infer/models/java/Makefile
@@ -8,9 +8,11 @@
 ROOT_DIR = ../../..
 include $(ROOT_DIR)/Makefile.config
 
-ANDROID_JAR = $(LIB_DIR)/java/android/android-19.jar
-JACKSON_JAR = $(DEPENDENCIES_DIR)/java/jackson/jackson-2.2.3.jar
+ANDROID_JAR = $(LIB_DIR)/java/android/android-23.jar
+GUAVA_JAR = $(DEPENDENCIES_DIR)/java/guava/guava-10.0.1-fork.jar
 INFER_ANNOTATIONS_JAR = $(ANNOTATIONS_DIR)/annotations.jar
+JACKSON_JAR = $(DEPENDENCIES_DIR)/java/jackson/jackson-2.2.3.jar
+JSR_305_JAR = $(DEPENDENCIES_DIR)/java/jsr-305/jsr305.jar
 
 MODELS_OUT = models
 INFER_REPORT = $(MODELS_OUT)/infer/report.json
@@ -21,6 +23,8 @@ JAVA_MODELS_SOURCES = $(shell find src -name "*.java")
 
 JAVA_SOURCES = $(JAVA_BUILTINS_SOURCES) $(JAVA_MODELS_SOURCES)
 
+MODELS_CLASSPATH = $(ANDROID_JAR):$(GUAVA_JAR):$(JACKSON_JAR):$(JSR_305_JAR):$(INFER_ANNOTATIONS_JAR)
+
 all: $(MODELS_JAR)
 
 clean:
@@ -28,12 +32,12 @@ clean:
 	@rm -f $(MODELS_JAR)
 	@rm -f $(JAVA_MODELS_JAR)
 
-$(INFER_REPORT): $(ANDROID_JAR) $(JACKSON_JAR) $(JAVA_DEPS) $(INFER_ANNOTATIONS_JAR) $(JAVA_SOURCES)
+$(INFER_REPORT): $(ANDROID_JAR) $(GUAVA_JAR) $(JACKSON_JAR) $(JSR_305_JAR) $(INFER_ANNOTATIONS_JAR) $(JAVA_DEPS) $(JAVA_SOURCES)
 	@rm -fr $(MODELS_OUT)
 	mkdir -p $(MODELS_OUT)
 	@rm -f $(JAVA_MODELS_JAR)
 	$(call silent_on_success,\
-	  $(INFER_BIN) --jobs 1 --buck --models-mode -- javac -bootclasspath $(ANDROID_JAR) -d $(MODELS_OUT) -classpath $(JACKSON_JAR):$(INFER_ANNOTATIONS_JAR) $(JAVA_SOURCES))
+	  $(INFER_BIN) --jobs 1 --buck --models-mode -- javac -bootclasspath $(ANDROID_JAR) -d $(MODELS_OUT) -classpath $(MODELS_CLASSPATH) $(JAVA_SOURCES))
 
 $(MODELS_JAR): $(INFER_REPORT)
 	cd $(MODELS_OUT); jar cf ../$(MODELS_JAR) *
diff --git a/infer/models/java/build.xml b/infer/models/java/build.xml
index 25e4840a4..18def6380 100644
--- a/infer/models/java/build.xml
+++ b/infer/models/java/build.xml
@@ -8,7 +8,7 @@
         <mkdir dir="classes"/>
         <javac srcdir="src" destdir="classes" includeantruntime="false">
             <bootclasspath>
-                <pathelement location="android/android-19.jar"/>
+                <pathelement location="android/android-23.jar"/>
             </bootclasspath>
             <classpath>
                 <pathelement location="../../../dependencies/java/jackson/jackson-2.2.3.jar"/>
diff --git a/infer/models/java/src/com/fasterxml/jackson/core/JsonFactory.java b/infer/models/java/src/com/fasterxml/jackson/core/JsonFactory.java
index a4c4893de..2d8276650 100644
--- a/infer/models/java/src/com/fasterxml/jackson/core/JsonFactory.java
+++ b/infer/models/java/src/com/fasterxml/jackson/core/JsonFactory.java
@@ -9,7 +9,6 @@
 
 package com.fasterxml.jackson.core;
 
-import com.android.internal.util.FileRotator.Reader;
 import com.fasterxml.jackson.core.json.PackageVersion;
 import com.fasterxml.jackson.core.json.UTF8StreamJsonParser;
 
@@ -17,12 +16,12 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.Reader;
 import java.net.URL;
 
 public class JsonFactory
         implements Versioned, java.io.Serializable {
 
-
     @Override
     public Version version() {
         return PackageVersion.VERSION;
diff --git a/infer/tests/build_systems/ant/build.xml b/infer/tests/build_systems/ant/build.xml
index b50bb1ea1..6511b884e 100644
--- a/infer/tests/build_systems/ant/build.xml
+++ b/infer/tests/build_systems/ant/build.xml
@@ -8,10 +8,14 @@
         <mkdir dir="ant_out"/>
         <javac srcdir="src/infer" destdir="ant_out" includeantruntime="false">
             <classpath>
-              <pathelement location="../../../lib/java/android/android-19.jar"/>
-              <pathelement location="../../../../dependencies/java/jackson/jackson-2.2.3.jar"/>
+              <pathelement location="../../../lib/java/android/android-23.jar"/>
+              <pathelement location="../../../lib/java/android/support/v4/android-support-v4.jar"/>
               <pathelement location="../../../lib/java/models.jar"/>
-              <pathelement location="../../../annotations//annotations.jar"/>
+              <pathelement location="../../../../dependencies/java/guava/guava-10.0.1-fork.jar"/>
+              <pathelement location="../../../../dependencies/java/jackson/jackson-2.2.3.jar"/>
+              <pathelement location="../../../../dependencies/java/jsr-305/jsr305.jar"/>
+
+              <pathelement location="../../../annotations/annotations.jar"/>
             </classpath>
         </javac>
     </target>
diff --git a/infer/tests/build_systems/ant/issues.exp b/infer/tests/build_systems/ant/issues.exp
index d9b5f86c2..008e171a2 100644
--- a/infer/tests/build_systems/ant/issues.exp
+++ b/infer/tests/build_systems/ant/issues.exp
@@ -151,6 +151,7 @@ codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.objectOutputStre
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpURLConnectionNotDisconnected(), 7, RESOURCE_LEAK, [start of procedure openHttpURLConnectionNotDisconnected()]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpsURLConnectionNotDisconnected(), 3, RESOURCE_LEAK, [start of procedure openHttpsURLConnectionNotDisconnected()]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromInputStreamAndLeak(JsonFactory), 5, RESOURCE_LEAK, [start of procedure parseFromInputStreamAndLeak(...)]
+codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromStringAndNotClose(JsonFactory), 4, RESOURCE_LEAK, [start of procedure parseFromStringAndNotClose(...)]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedInputStreamNotClosedAfterRead(PipedOutputStream), 6, RESOURCE_LEAK, [start of procedure pipedInputStreamNotClosedAfterRead(...),exception java.io.IOException]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedOutputStreamNotClosedAfterWrite(), 7, RESOURCE_LEAK, [start of procedure pipedOutputStreamNotClosedAfterWrite(),exception java.io.IOException]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.scannerNotClosed(), 1, RESOURCE_LEAK, [start of procedure scannerNotClosed()]
diff --git a/infer/tests/build_systems/buck/issues.exp b/infer/tests/build_systems/buck/issues.exp
index 1978aecb7..ddea57a9a 100644
--- a/infer/tests/build_systems/buck/issues.exp
+++ b/infer/tests/build_systems/buck/issues.exp
@@ -151,6 +151,7 @@ infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.obje
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpURLConnectionNotDisconnected(), 7, RESOURCE_LEAK, [start of procedure openHttpURLConnectionNotDisconnected()]
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpsURLConnectionNotDisconnected(), 3, RESOURCE_LEAK, [start of procedure openHttpsURLConnectionNotDisconnected()]
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromInputStreamAndLeak(JsonFactory), 5, RESOURCE_LEAK, [start of procedure parseFromInputStreamAndLeak(...)]
+infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromStringAndNotClose(JsonFactory), 4, RESOURCE_LEAK, [start of procedure parseFromStringAndNotClose(...)]
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedInputStreamNotClosedAfterRead(PipedOutputStream), 6, RESOURCE_LEAK, [start of procedure pipedInputStreamNotClosedAfterRead(...),exception java.io.IOException]
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedOutputStreamNotClosedAfterWrite(), 7, RESOURCE_LEAK, [start of procedure pipedOutputStreamNotClosedAfterWrite(),exception java.io.IOException]
 infer/tests/codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.scannerNotClosed(), 1, RESOURCE_LEAK, [start of procedure scannerNotClosed()]
diff --git a/infer/tests/codetoanalyze/java/harness/issues.exp b/infer/tests/codetoanalyze/java/harness/issues.exp
index 147db9bba..5beb83bd0 100644
--- a/infer/tests/codetoanalyze/java/harness/issues.exp
+++ b/infer/tests/codetoanalyze/java/harness/issues.exp
@@ -1 +1 @@
-codetoanalyze/java/harness/BasicHarnessActivity.java, codetoanalyze.java.harness.BasicHarnessActivity.InferGeneratedHarness(), -1, NULL_DEREFERENCE, [start of procedure InferGeneratedHarness(),start of procedure onCreate(...),return from a call to void BasicHarnessActivity.onCreate(Bundle),start of procedure onPause(),return from a call to void BasicHarnessActivity.onPause(),start of procedure onDestroy()]
+codetoanalyze/java/harness/BasicHarnessActivity.java, codetoanalyze.java.harness.BasicHarnessActivity.InferGeneratedHarness(), -1, NULL_DEREFERENCE, [start of procedure InferGeneratedHarness(),start of procedure onPause(),return from a call to void BasicHarnessActivity.onPause(),start of procedure onDestroy()]
diff --git a/infer/tests/codetoanalyze/java/infer/ResourceLeaks.java b/infer/tests/codetoanalyze/java/infer/ResourceLeaks.java
index e1db9eb47..cd9cf1384 100644
--- a/infer/tests/codetoanalyze/java/infer/ResourceLeaks.java
+++ b/infer/tests/codetoanalyze/java/infer/ResourceLeaks.java
@@ -690,7 +690,7 @@ public class ResourceLeaks {
   public void parseFromStringAndNotClose(JsonFactory factory) throws IOException {
     UTF8StreamJsonParser parser = null;
     try {
-      parser = (UTF8StreamJsonParser) factory.createParser("[]");
+      parser = (UTF8StreamJsonParser) factory.createParser(new File("[]"));
       Object o = parser.readValueAs(Object.class);
       ignore(o);
     } catch (Exception e) {
diff --git a/infer/tests/codetoanalyze/java/infer/issues.exp b/infer/tests/codetoanalyze/java/infer/issues.exp
index 77ccdd861..fa2de3f48 100644
--- a/infer/tests/codetoanalyze/java/infer/issues.exp
+++ b/infer/tests/codetoanalyze/java/infer/issues.exp
@@ -262,7 +262,8 @@ codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.objectOutputStre
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpURLConnectionNotDisconnected(), 7, RESOURCE_LEAK, [start of procedure openHttpURLConnectionNotDisconnected()]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.openHttpsURLConnectionNotDisconnected(), 3, RESOURCE_LEAK, [start of procedure openHttpsURLConnectionNotDisconnected()]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromInputStreamAndLeak(JsonFactory), 5, RESOURCE_LEAK, [start of procedure parseFromInputStreamAndLeak(...)]
-codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromInputStreamAndLeak(JsonFactory), 10, NULL_TEST_AFTER_DEREFERENCE, [start of procedure parseFromInputStreamAndLeak(...),exception com.fasterxml.jackson.core.JsonParseException,Switch condition is true. Entering switch case,Taking false branch]
+codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromInputStreamAndLeak(JsonFactory), 10, NULL_TEST_AFTER_DEREFERENCE, [start of procedure parseFromInputStreamAndLeak(...),exception java.io.IOException,Switch condition is true. Entering switch case,Taking false branch]
+codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.parseFromStringAndNotClose(JsonFactory), 4, RESOURCE_LEAK, [start of procedure parseFromStringAndNotClose(...)]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedInputStreamClosed(PipedOutputStream), 4, RETURN_VALUE_IGNORED, [start of procedure pipedInputStreamClosed(...)]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedInputStreamNotClosedAfterRead(PipedOutputStream), 4, RETURN_VALUE_IGNORED, [start of procedure pipedInputStreamNotClosedAfterRead(...)]
 codetoanalyze/java/infer/ResourceLeaks.java, void ResourceLeaks.pipedInputStreamNotClosedAfterRead(PipedOutputStream), 6, RESOURCE_LEAK, [start of procedure pipedInputStreamNotClosedAfterRead(...),exception java.io.IOException]
diff --git a/infer/tests/codetoanalyze/java/quandary/WebViews.java b/infer/tests/codetoanalyze/java/quandary/WebViews.java
index d4f6f84a2..316fa539d 100644
--- a/infer/tests/codetoanalyze/java/quandary/WebViews.java
+++ b/infer/tests/codetoanalyze/java/quandary/WebViews.java
@@ -10,7 +10,12 @@
 package codetoanalyze.java.quandary;
 
 import android.content.Context;
+
+import android.content.Intent;
+import android.net.Uri;
 import android.webkit.JavascriptInterface;
+import android.webkit.ValueCallback;
+import android.webkit.WebMessage;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.webkit.WebChromeClient;
@@ -27,6 +32,7 @@ public class WebViews {
     webview.loadData(stringSource, "", "");
     webview.loadDataWithBaseURL("", stringSource, "", "", "");
     webview.loadUrl(stringSource); // should have 5 reports
+    webview.postWebMessage(null, (Uri) InferTaint.inferSecretSource());
   }
 
   void callWebviewClientSinks(WebView webview, WebViewClient client) {
diff --git a/infer/tests/codetoanalyze/java/quandary/issues.exp b/infer/tests/codetoanalyze/java/quandary/issues.exp
index 6e4fee35b..bd44731f6 100644
--- a/infer/tests/codetoanalyze/java/quandary/issues.exp
+++ b/infer/tests/codetoanalyze/java/quandary/issues.exp
@@ -179,6 +179,7 @@ codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSinks(WebVie
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSinks(WebView), 5, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebView.loadData(String,String,String)]
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSinks(WebView), 6, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebView.loadDataWithBaseURL(String,String,String,String,String)]
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSinks(WebView), 7, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebView.loadUrl(String)]
+codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSinks(WebView), 8, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebView.postWebMessage(WebMessage,Uri)]
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSubclassSinks(WebViews$MyWebView,WebViews$MyWebViewClient,WebViews$MyWebChromeClient), 4, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebView.evaluateJavascript(String,ValueCallback)]
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSubclassSinks(WebViews$MyWebView,WebViews$MyWebViewClient,WebViews$MyWebChromeClient), 5, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to void WebViewClient.onLoadResource(WebView,String)]
 codetoanalyze/java/quandary/WebViews.java, void WebViews.callWebviewSubclassSinks(WebViews$MyWebView,WebViews$MyWebViewClient,WebViews$MyWebChromeClient), 6, QUANDARY_TAINT_ERROR, [return from Object InferTaint.inferSecretSource(),call to boolean WebChromeClient.onJsAlert(WebView,String,String,JsResult)]
diff --git a/infer/tests/java.make b/infer/tests/java.make
index d82a4af53..7b695ad84 100644
--- a/infer/tests/java.make
+++ b/infer/tests/java.make
@@ -9,12 +9,13 @@ ROOT_DIR = $(TESTS_DIR)/../..
 
 include $(ROOT_DIR)/Makefile.config
 
-ANDROID19 = $(JAVA_LIB_DIR)/android/android-19.jar
+ANDROID = $(JAVA_LIB_DIR)/android/android-23.jar
 ANDROIDSUPPORT = $(DEPENDENCIES_DIR)/java/android/support/v4/android-support-v4.jar
 ANNOTATIONS = $(ANNOTATIONS_DIR)/annotations.jar
 BUTTERKNIFE = $(DEPENDENCIES_DIR)/java/butterknife/butterknife-7.0.1.jar
+GUAVA = $(DEPENDENCIES_DIR)/java/guava/guava-10.0.1-fork.jar
 JACKSON = $(DEPENDENCIES_DIR)/java/jackson/jackson-2.2.3.jar
 JSR305 = $(DEPENDENCIES_DIR)/java/jsr-305/jsr305.jar
 INJECT = $(DEPENDENCIES_DIR)/java/jsr-330/javax.inject.jar
 
-CLASSPATH=$(ANDROID19):$(ANDROIDSUPPORT):$(ANNOTATIONS):$(BUTTERKNIFE):$(JACKSON):$(JSR305):$(INJECT):$(JAVA_BUILTINS_DIR):.
+CLASSPATH=$(ANDROID):$(ANDROIDSUPPORT):$(ANNOTATIONS):$(BUTTERKNIFE):$(GUAVA):$(JACKSON):$(JSR305):$(INJECT):$(JAVA_BUILTINS_DIR):.