diff --git a/cime_config/buildnml b/cime_config/buildnml
index cbefd4f155..2c4a320046 100644
--- a/cime_config/buildnml
+++ b/cime_config/buildnml
@@ -184,9 +184,7 @@ def buildnml(case, caseroot, compname):
     clm_phys = case.get_value("CLM_PHYSICS_VERSION")
 
     config_cache_text = _config_cache_template.format(clm_phys=clm_phys)
-    config_cache_path = os.path.join(
-        caseroot, "Buildconf", compname + "conf", "config_cache.xml"
-    )
+    config_cache_path = os.path.join(caseroot, "Buildconf", compname + "conf", "config_cache.xml")
     with open(config_cache_path, "w") as config_cache_file:
         config_cache_file.write(config_cache_text)
 
@@ -293,17 +291,13 @@ def buildnml(case, caseroot, compname):
         if (yr_start != None) and (yr_end != None):
             nyr = yr_end - yr_start + 1
             if (yr_end <= 0) or (yr_start <= 0):
-                logger.error(
-                    "ERROR: Year start and end are both negative and should not be"
-                )
+                logger.error("ERROR: Year start and end are both negative and should not be")
             clm_namelist_opts = "nyr_forcing={} {}".format(nyr, clm_namelist_opts)
         else:
             logger.warning(
                 "WARNING: It does not make sense to do a SASU spinup with a prognostic atmosphere model"
             )
-            logger.warning(
-                "         as it expects regular atmosphere forcing that is cycled over"
-            )
+            logger.warning("         as it expects regular atmosphere forcing that is cycled over")
 
     infile = os.path.join(ctsmconf, "namelist")
 
@@ -317,9 +311,7 @@ def buildnml(case, caseroot, compname):
         lndfrac_file = os.path.join(lnd_domain_path, lnd_domain_file)
         lndfrac_setting = "-lnd_frac " + lndfrac_file
 
-    config_cache_file = os.path.join(
-        caseroot, "Buildconf", compname + "conf", "config_cache.xml"
-    )
+    config_cache_file = os.path.join(caseroot, "Buildconf", compname + "conf", "config_cache.xml")
 
     # -----------------------------------------------------
     # Clear out old data
@@ -389,9 +381,7 @@ def buildnml(case, caseroot, compname):
                         break
 
             if not os.path.exists(os.path.join(rundir, clm_startfile)):
-                logger.warning(
-                    "WARNING: Could NOT find a start file named " + clm_startfile
-                )
+                logger.warning("WARNING: Could NOT find a start file named " + clm_startfile)
             clm_icfile = "%s = '%s'" % (startfile_type, clm_startfile)
         else:
             clm_icfile = ""
@@ -402,9 +392,7 @@ def buildnml(case, caseroot, compname):
         user_nl_file = os.path.join(caseroot, "user_nl_clm" + inst_string)
         namelist_infile = os.path.join(ctsmconf, "namelist")
 
-        create_namelist_infile(
-            case, user_nl_file, namelist_infile, "\n".join(infile_lines)
-        )
+        create_namelist_infile(case, user_nl_file, namelist_infile, "\n".join(infile_lines))
 
         cmd = os.path.join(lnd_root, "bld", "build-namelist")