diff --git a/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIFletcher.cpp b/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIFletcher.cpp
index 13137a78722..15533285bbb 100644
--- a/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIFletcher.cpp
+++ b/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIFletcher.cpp
@@ -262,8 +262,8 @@ TEST_F( AcousticVTIFletcherWaveEquationSEMTest, SeismoTrace )
     avg /= 8.0;
     ASSERT_TRUE( std::abs( pReceivers[i][8] - avg ) < 0.00001 );
   }
-  // (not supported yet) run adjoint solver
-/*
+  //run adjoint solver
+
    for( int i = 0; i < 10; i++ )
    {
     propagator->explicitStepBackward( time_n, dt, i, domain, false );
@@ -283,7 +283,7 @@ TEST_F( AcousticVTIFletcherWaveEquationSEMTest, SeismoTrace )
     }
     avg /= 8.0;
     ASSERT_TRUE( std::abs( pReceivers[i][8] - avg ) < 0.00001 );
-   }*/
+   }
 }
 
 
diff --git a/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIZhang.cpp b/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIZhang.cpp
index edba9c0011f..685df387478 100644
--- a/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIZhang.cpp
+++ b/src/coreComponents/unitTests/wavePropagationTests/testWavePropagationVTIZhang.cpp
@@ -255,8 +255,8 @@ TEST_F( AcousticVTIZhangWaveEquationSEMTest, SeismoTrace )
     avg /= 8.0;
     ASSERT_TRUE( std::abs( pReceivers[i][8] - avg ) < 0.00001 );
   }
-  // (not supported yet) run adjoint solver
-/*  for( int i = 0; i < 10; i++ )
+  // run adjoint solver
+  for( int i = 0; i < 10; i++ )
    {
     propagator->explicitStepBackward( time_n, dt, i, domain, false );
     time_n += dt;
@@ -275,7 +275,7 @@ TEST_F( AcousticVTIZhangWaveEquationSEMTest, SeismoTrace )
     }
     avg /= 8.0;
     ASSERT_TRUE( std::abs( pReceivers[i][8] - avg ) < 0.00001 );
-   }*/
+   }
 }