diff --git a/test/product_mmtr.cpp b/test/product_mmtr.cpp
index ecb5c36a3..b66529acd 100644
--- a/test/product_mmtr.cpp
+++ b/test/product_mmtr.cpp
@@ -33,6 +33,8 @@ template<typename Scalar> void mmtr(int size)
   MatrixColMaj osc(othersize,size); osc.setRandom();
   MatrixRowMaj sor(size,othersize); sor.setRandom();
   MatrixRowMaj osr(othersize,size); osr.setRandom();
+  MatrixColMaj sqc(size,size); sqc.setRandom();
+  MatrixRowMaj sqr(size,size); sqr.setRandom();
   
   Scalar s = internal::random<Scalar>();
   
@@ -50,6 +52,16 @@ template<typename Scalar> void mmtr(int size)
   CHECK_MMTR(matc, Upper, -= s*(osc.transpose()*osc.conjugate()));
   CHECK_MMTR(matr, Lower, -= s*soc*soc.adjoint());
   CHECK_MMTR(matr, Upper, -= soc*(s*soc.adjoint()));
+  
+  CHECK_MMTR(matc, Lower, -= s*sqr*sqc.template triangularView<Upper>());
+  CHECK_MMTR(matc, Upper, = s*sqc*sqr.template triangularView<Upper>());
+  CHECK_MMTR(matc, Lower, += s*sqr*sqc.template triangularView<Lower>());
+  CHECK_MMTR(matc, Upper, = s*sqc*sqc.template triangularView<Lower>());
+  
+  CHECK_MMTR(matc, Lower, = (s*sqr).template triangularView<Upper>()*sqc);
+  CHECK_MMTR(matc, Upper, -= (s*sqc).template triangularView<Upper>()*sqc);
+  CHECK_MMTR(matc, Lower, = (s*sqr).template triangularView<Lower>()*sqc);
+  CHECK_MMTR(matc, Upper, += (s*sqc).template triangularView<Lower>()*sqc);
 }
 
 void test_product_mmtr()