diff --git a/dx/etc/mainDexClasses.rules b/dx/etc/mainDexClasses.rules
index 0cd3842..a1ca931 100644
--- a/dx/etc/mainDexClasses.rules
+++ b/dx/etc/mainDexClasses.rules
@@ -13,8 +13,3 @@
   -keep public class * extends java.lang.annotation.Annotation {
    *;
   }
-# Keep old fashion tests in the main dex or they'll be silently ignored by InstrumentationTestRunner
-  -keep public class * extends android.test.InstrumentationTestCase {
-   <init>();
-  }
-
diff --git a/dx/shrinkedAndroid.proguard.flags b/dx/shrinkedAndroid.proguard.flags
index c22ec92..d72bb18 100644
--- a/dx/shrinkedAndroid.proguard.flags
+++ b/dx/shrinkedAndroid.proguard.flags
@@ -19,6 +19,4 @@
 }
 -keep public class java.lang.annotation.Annotation {
 }
--keep public class * extends android.test.InstrumentationTestCase {
-}