diff --git a/tools/scripts/android_rules.xml b/tools/scripts/android_rules.xml
index 8b7fe8858..5b327369a 100644
--- a/tools/scripts/android_rules.xml
+++ b/tools/scripts/android_rules.xml
@@ -230,10 +230,12 @@
     <!-- Compiles this project's .java files into .class files. -->
     <target name="compile" depends="-resource-src, -aidl"
                 description="Compiles project's .java files into .class files">
-        <!-- Allows to inject additional classpath from another (build|property) file.
-             As ant properties are immutable, the injected value will have priority
-             over the one defined below -->
-        <property name="extensible.classpath" value="." />
+        <!-- If android rules are used for a test project, its classpath should include
+             tested project's location -->
+        <condition property="extensible.classpath"
+                           value="${tested.project.absolute.dir}/bin/classes" else=".">
+            <isset property="tested.project.absolute.dir" />
+        </condition>
         <javac encoding="ascii" target="1.5" debug="true" extdirs=""
                 destdir="${out.classes.absolute.dir}"
                 bootclasspathref="android.target.classpath"
@@ -278,8 +280,14 @@
         <package-helper sign.package="false" />
     </target>
 
+    <target name="-compile-tested-if-test" if="tested.project.dir" unless="do.not.compile.again">
+       <subant target="compile">
+            <fileset dir="${tested.project.absolute.dir}" includes="build.xml" />
+       </subant>
+    </target>
+
     <!-- Builds debug output package, provided all the necessary files are already dexed -->
-    <target name="debug" depends="-package-debug-sign"
+    <target name="debug" depends="-compile-tested-if-test, -package-debug-sign"
                 description="Builds the application and signs it with a debug key.">
         <zipalign-helper in.package="${out.debug.unaligned.package}"
                                    out.package="${out.debug.package}" />
diff --git a/tools/scripts/android_test_rules.xml b/tools/scripts/android_test_rules.xml
index fd8a52158..efeb9a176 100644
--- a/tools/scripts/android_test_rules.xml
+++ b/tools/scripts/android_test_rules.xml
@@ -43,27 +43,22 @@
                       location="${instrumentation.absolute.dir}/classes" />
     </target>
 
-    <!-- Invoking this target sets the value of extensible.classpath, which is being added to javac
-         classpath in target 'compile' (android_rules.xml) -->
-    <target name="-set-run-tests-classpath">
-        <property name="extensible.classpath"
-                      location="${tested.project.absolute.dir}/bin/classes" />
-    </target>
-
     <!-- Ensures that tested project is installed on the device before we run the tests.
          Used for ordinary tests, without coverage measurement -->
     <target name="-install-tested-project">
+        <property name="do.not.compile.again" value="true" />
         <subant target="install">
             <fileset dir="${tested.project.absolute.dir}" includes="build.xml" />
         </subant>
     </target>
 
-    <target name="run-tests" depends="-set-run-tests-classpath, -install-tested-project, install"
+    <target name="run-tests" depends="-install-tested-project, install"
                 description="Runs tests from the package defined in test.package property">
         <run-tests-helper />
     </target>
 
     <target name="-install-instrumented">
+        <property name="do.not.compile.again" value="true" />
         <subant target="-install-with-emma">
             <property name="out.absolute.dir" value="${instrumentation.absolute.dir}" />
             <fileset dir="${tested.project.absolute.dir}" includes="build.xml" />