diff --git a/modules/java/android_test/src/org/opencv/test/OpenCVTestCase.java b/modules/java/android_test/src/org/opencv/test/OpenCVTestCase.java
index 2d41d02d8a..dc8ef97ef2 100644
--- a/modules/java/android_test/src/org/opencv/test/OpenCVTestCase.java
+++ b/modules/java/android_test/src/org/opencv/test/OpenCVTestCase.java
@@ -19,6 +19,8 @@ public class OpenCVTestCase extends AndroidTestCase {
     static Mat gray128;
     static Mat gray255;
     
+    static Mat gray255_32f;
+    
     static Mat grayRnd;    
     static Mat grayRnd_32f;
     
@@ -49,6 +51,8 @@ public class OpenCVTestCase extends AndroidTestCase {
         gray128 = new Mat(matSize, matSize, Mat.CvType.CV_8UC1); gray128.setTo(128.0);
         gray255 = new Mat(matSize, matSize, Mat.CvType.CV_8UC1); gray255.setTo(256.0);
         
+        gray255_32f = new Mat(matSize, matSize, Mat.CvType.CV_32FC1); gray255_32f.setTo(255.0);
+        
         Mat low  = new Mat(1, 1, Mat.CvType.CV_16UC1); low.setTo(0);
         Mat high = new Mat(1, 1, Mat.CvType.CV_16UC1); high.setTo(256);
         grayRnd = new Mat(matSize, matSize, Mat.CvType.CV_8UC1); core.randu(grayRnd, low, high);
diff --git a/modules/java/android_test/src/org/opencv/test/coreTest.java b/modules/java/android_test/src/org/opencv/test/coreTest.java
index e2b7a6d010..230ccfa904 100644
--- a/modules/java/android_test/src/org/opencv/test/coreTest.java
+++ b/modules/java/android_test/src/org/opencv/test/coreTest.java
@@ -63,11 +63,14 @@ public class coreTest extends OpenCVTestCase {
 	}
 
 	public void testAddWeightedMatDoubleMatDoubleDoubleMatInt() {
-		fail("Not yet implemented");
+		Mat dst = new Mat();
+		core.addWeighted(gray1, 126.0, gray127, 1.0, 2.0, dst, gray255_32f.depth());
+		assertTrue(gray255_32f.depth() == dst.depth());
 	}
 
 	public void testAddWeightedMatDoubleMatDoubleDoubleMat() {
-		fail("Not yet implemented");
+		core.addWeighted(gray1, 126.0, gray127, 1.0, 2.0, dst_gray);
+		assertMatEqual(gray255, dst_gray);		
 	}
 
 	public void testBitwise_andMatMatMatMat() {
@@ -164,6 +167,11 @@ public class coreTest extends OpenCVTestCase {
 		
         core.compare(gray0, gray1, cmp, core.CMP_EQ);
         assertMatEqual(cmp, gray0);
+        
+        core.compare(gray0, grayRnd, cmp, core.CMP_EQ);
+        double nBlackPixels = core.countNonZero(cmp);
+        double nNonBlackpixels = core.countNonZero(grayRnd);
+        assertTrue((nBlackPixels+nNonBlackpixels) == grayRnd.rows()*grayRnd.cols());
 	}
 
 	public void testCompleteSymmMatBoolean() {
@@ -419,7 +427,8 @@ public class coreTest extends OpenCVTestCase {
 	}
 
 	public void testMulTransposedMatMatBooleanMat() {
-		fail("Not yet implemented");
+		core.mulTransposed(grayRnd_32f, dst_gray_32f, true, grayRnd_32f);
+		assertMatEqual(gray0_32f, dst_gray_32f);
 	}
 
 	public void testMulTransposedMatMatBoolean() {