diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc5f0095a71ed5a5f649a20a8160b18c3f68d66f..8d6a8dcc51743b271a2f9626a7c9212bebc77d5a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -409,7 +409,7 @@ add_test(test_richards bin/runTest.sh references/richardslens-reference.vtu  ric
 add_test(test_diffusion bin/runTest.sh references/diffusion-reference.vtu      mimeticdiffusion-00001.vtu test/decoupled/1p/test_diffusion 3)
 add_test(test_dec1p     bin/runTest.sh references/test_1p-reference.vtu        test_1p-00001.vtu          test/decoupled/1p/test_dec1p --parameter-file=test/decoupled/1p/test_1p.input)
 add_test(test_transport bin/runTest.sh references/test_transport-reference.vtu test_transport-00006.vtu   test/decoupled/2p/test_transport --parameter-file=parameters/test_transport.input -gridFile test/decoupled/2p/grids/test_transport.dgf)
-add_test(test_impes     bin/runTest.sh references/test_impes-reference.vtu     test_impes-00050.vtu       test/decoupled/2p/test_impes     --parameter-file=parameters/test_impes.input)
+add_test(test_impes     bin/runTest.sh references/test_impes-reference.vtu     test_impes-00013.vtu       test/decoupled/2p/test_impes     --parameter-file=parameters/test_impes.input)
 add_test(test_impes_adaptive     bin/runTest.sh references/output2padaptive-reference.vtu output2padaptive-00007.vtu      test/decoupled/2padaptive/test_impes_adaptive  parameters/input)
 add_test(test_dec2p2c   bin/runTest.sh references/test_dec2p2c-reference.vtu   test_dec2p2c-00021.vtu     test/decoupled/2p2c/test_dec2p2c --parameter-file=parameters/test_dec2p2c.input)
 add_test(test_multiphysics2p2c   bin/runTest.sh references/test_multiphysics2p2c-reference.vtu   test_multiphysics2p2c-00021.vtu     test/decoupled/2p2c/test_multiphysics2p2c)