diff --git a/test/postProcessing/channel/system/controlDict b/test/postProcessing/channel/system/controlDict
index 4a54d1243c..7ddd563042 100644
--- a/test/postProcessing/channel/system/controlDict
+++ b/test/postProcessing/channel/system/controlDict
@@ -319,7 +319,14 @@ solversFunctions
 {
     #includeFunc scalarTransport(s, schemesField=h)
 
-    #includeFunc phaseScalarTransport(s.dummy, schemesField=h, p=p_rgh, rho=rho)
+    #includeFunc phaseScalarTransport
+    (
+        s.dummy,
+        solveAlphaPhi=yes,
+        p=p_rgh,
+        rho=rho,
+        schemesField=h
+    )
 
     // Not possible to test here as not compatible with compressible solvers
     //#includeFunc particles
diff --git a/test/postProcessing/channel/system/fvSchemes b/test/postProcessing/channel/system/fvSchemes
index c82f1d1a21..26e79bd332 100644
--- a/test/postProcessing/channel/system/fvSchemes
+++ b/test/postProcessing/channel/system/fvSchemes
@@ -38,7 +38,7 @@ divSchemes
     div(phi,K)      Gauss linear;
     div(((rho*nuEff)*dev2(T(grad(U))))) Gauss linear;
 
-    div(alphaPhi.dummy,h) Gauss upwind;
+    div(phaseScalarTransport:alphaPhi.dummy,h) Gauss upwind;
 }
 
 laplacianSchemes