diff --git a/example/Bubble/input.db b/example/Bubble/input.db
index b1a80cd2..8a88ec54 100644
--- a/example/Bubble/input.db
+++ b/example/Bubble/input.db
@@ -10,6 +10,7 @@ Color {
     pBC = 0
     din = 1.0
     dout = 1.0
+    flux = 1.0e-3
     timestepMax = 200
     interval = 1000
     tol = 1e-5;
@@ -19,7 +20,7 @@ Color {
 
 Domain {
     nproc = 1, 1, 1     // Number of processors (Npx,Npy,Npz)
-    n = 16, 16, 16      // Size of local domain (Nx,Ny,Nz)
+    n = 80, 80, 80      // Size of local domain (Nx,Ny,Nz)
     n_spheres = 1       // Number of spheres
     L = 1, 1, 1         // Length of domain (x,y,z)
     BC = 0              // Boundary condition type
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index d7510853..e56742e2 100755
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -46,14 +46,13 @@ ADD_LBPM_TEST( TestMap )
 #ADD_LBPM_TEST( TestColorGradDFH )
 ADD_LBPM_TEST( TestColorGradDFH )
 ADD_LBPM_TEST( TestBubbleDFH ../example/Bubble/input.db)
-ADD_LBPM_TEST( TestColorMassBounceback ../example/Bubble/input.db)
+#ADD_LBPM_TEST( TestColorMassBounceback ../example/Bubble/input.db)
 ADD_LBPM_TEST( TestPressVel  ../example/Piston/input.db)
 ADD_LBPM_TEST( TestPoiseuille ../example/Piston/poiseuille.db)
 ADD_LBPM_TEST( TestForceMoments  ../example/Piston/input.db)
 ADD_LBPM_TEST( TestForceD3Q19 )
 ADD_LBPM_TEST( TestMomentsD3Q19 )
-
-ADD_LBPM_TEST( TestInterfaceSpeed  ../example/Piston/input.db)
+ADD_LBPM_TEST( TestInterfaceSpeed  ../example/Bubble/input.db)
 ADD_LBPM_TEST( TestSphereCurvature )
 #ADD_LBPM_TEST_1_2_4( TestTwoPhase )
 ADD_LBPM_TEST_1_2_4( TestBlobIdentify )
diff --git a/tests/TestInterfaceSpeed.cpp b/tests/TestInterfaceSpeed.cpp
index aa7ca139..94b3c47a 100644
--- a/tests/TestInterfaceSpeed.cpp
+++ b/tests/TestInterfaceSpeed.cpp
@@ -38,7 +38,9 @@ int main (int argc, char *argv[])
 
     std::shared_ptr<Domain> Dm(new Domain(domain_db,comm));
 
-	for (i=0; i<Dm->Nx*Dm->Ny*Dm->Nz; i++) Dm->id[i] = 1;
+    Nx+=2; Ny+=2; Nz+=2;
+
+	for (i=0; i<Nx*Ny*Nz; i++) Dm->id[i] = 1;
 
 	Dm->CommInit();
 
@@ -137,11 +139,11 @@ int main (int argc, char *argv[])
 		toReturn = 5;
 		printf("TestCylinderArea.cpp: error tolerance exceeded for common curve length \n");
 	}
-	if ( fabs(Averages->vawn_global(2)+0.2) > 0.01){
+	if ( fabs(Averages->vawn_global(2)+0.25) > 0.01){
 		printf("TestInterfaceSpeed: Error too high for kinematic velocity of wn interface \n");
 		toReturn = 6;
 	}
-	if ( fabs(Averages->vawns_global(2)+0.2) > 0.01){
+	if ( fabs(Averages->vawns_global(2)+0.25) > 0.01){
 		printf("TestInterfaceSpeed: Error too high for kinematic velocity of common curve \n");
 		toReturn = 7;
 	}