diff --git a/dsim/BUILD b/dsim/BUILD
index 1e915f98..e9ed091d 100644
--- a/dsim/BUILD
+++ b/dsim/BUILD
@@ -16,4 +16,3 @@ package(
     default_applicable_licenses = ["//:package_license"],
     default_visibility = ["//visibility:private"],
 )
-
diff --git a/dsim/defs.bzl b/dsim/defs.bzl
index ca801de7..136909bc 100644
--- a/dsim/defs.bzl
+++ b/dsim/defs.bzl
@@ -17,7 +17,6 @@ load("//verilog:defs.bzl", "VerilogInfo")
 _RUNFILES = ["dat", "mem"]
 
 def _dsim_run(ctx):
-
     transitive_srcs = depset([], transitive = [ctx.attr.module[VerilogInfo].dag]).to_list()
 
     all_srcs = [verilog_info_struct.srcs for verilog_info_struct in transitive_srcs]
@@ -25,7 +24,7 @@ def _dsim_run(ctx):
     all_data = [verilog_info_struct.data for verilog_info_struct in transitive_srcs]
 
     all_files = [src for sub_tuple in (all_srcs + all_data) for src in sub_tuple]
-    all_hdrs  = [hdr for sub_tuple in all_hdrs for hdr in sub_tuple]
+    all_hdrs = [hdr for sub_tuple in all_hdrs for hdr in sub_tuple]
 
     # Filter out data files.
     runfiles = []
@@ -47,7 +46,7 @@ def _dsim_run(ctx):
     dsim_log = ctx.actions.declare_file("{}.log".format(ctx.label.name))
 
     # Build DSim command
-    command  = "source " + ctx.file.dsim_env.path + " && "
+    command = "source " + ctx.file.dsim_env.path + " && "
     command += "dsim"
     command += " -l " + dsim_log.path
 
@@ -60,9 +59,10 @@ def _dsim_run(ctx):
     for verilog_file in verilog_files:
         command += " " + verilog_file.path
 
-    inputs  = [ctx.file.dsim_env] + verilog_files + all_hdrs
+    inputs = [ctx.file.dsim_env] + verilog_files + all_hdrs
     outputs = [dsim_log] + ctx.outputs.outs
     generated_files = [dsim_log]
+
     # Coverage file
     if ctx.attr.enable_code_coverage:
         dsim_cov = ctx.actions.declare_file("{}.db".format(ctx.label.name))
@@ -73,8 +73,8 @@ def _dsim_run(ctx):
         if ctx.attr.code_coverage_scope != "":
             scope_file = ctx.actions.declare_file("{}.scope".format(ctx.label.name))
             ctx.actions.write(
-                output=scope_file,
-                content="path {} +".format(ctx.attr.code_coverage_scope),
+                output = scope_file,
+                content = "path {} +".format(ctx.attr.code_coverage_scope),
             )
             command += " -code-cov-scope-specs {}".format(scope_file.path)
             inputs.append(scope_file)
@@ -144,4 +144,3 @@ dsim_run = rule(
         ),
     },
 )
-