diff --git a/cime_config/testdefs/testmods_dirs/mom/cfc_mods/shell_commands b/cime_config/testdefs/testmods_dirs/mom/cfc_mods/shell_commands
deleted file mode 100644
index 6cf8fb8f..00000000
--- a/cime_config/testdefs/testmods_dirs/mom/cfc_mods/shell_commands
+++ /dev/null
@@ -1,2 +0,0 @@
-# Set RUN_STARTDATE to ensure atmospheric pCFC forcing is nonzero. The year 1980 is otherwise arbitrary.
-./xmlchange RUN_STARTDATE=1980-01-01
diff --git a/cime_config/testdefs/testmods_dirs/mom/cfc_mods/user_nl_mom b/cime_config/testdefs/testmods_dirs/mom/cfc_mods/user_nl_mom
index e9d0020c..a7d40667 100644
--- a/cime_config/testdefs/testmods_dirs/mom/cfc_mods/user_nl_mom
+++ b/cime_config/testdefs/testmods_dirs/mom/cfc_mods/user_nl_mom
@@ -1,3 +1,4 @@
 USE_CFC_CAP = True
 CFC11_IC_VAL = 1.0e-100
 CFC12_IC_VAL = 1.0e-100
+CFC_BC_MODEL_YEAR=1