diff --git a/regtest/membranefusion/rt-fusionporeexpansionp/config b/regtest/membranefusion/rt-fusionporeexpansionp/config
index c124cf6c4f..3f5f5dcd43 100644
--- a/regtest/membranefusion/rt-fusionporeexpansionp/config
+++ b/regtest/membranefusion/rt-fusionporeexpansionp/config
@@ -1,3 +1,4 @@
 type=driver
+plumed_modules=membranefusion
 # this is to test a different name
 arg="--plumed plumed.dat --mf_xtc FusionPoreExpansionP.xtc"
diff --git a/regtest/membranefusion/rt-fusionporenucleationp/config b/regtest/membranefusion/rt-fusionporenucleationp/config
index 8c8feb91f7..d49f62bec9 100644
--- a/regtest/membranefusion/rt-fusionporenucleationp/config
+++ b/regtest/membranefusion/rt-fusionporenucleationp/config
@@ -1,3 +1,4 @@
 type=driver
+plumed_modules=membranefusion
 # this is to test a different name
 arg="--plumed plumed.dat --mf_xtc FusionPoreNucleationP.xtc"
diff --git a/regtest/membranefusion/rt-memfusionp/config b/regtest/membranefusion/rt-memfusionp/config
index 0d27dc230f..4edfec3ba4 100644
--- a/regtest/membranefusion/rt-memfusionp/config
+++ b/regtest/membranefusion/rt-memfusionp/config
@@ -1,3 +1,4 @@
 type=driver
+plumed_modules=membranefusion
 # this is to test a different name
 arg="--plumed plumed.dat --mf_xtc MemFusionP.xtc"