diff --git a/src/rebar_eunit.erl b/src/rebar_eunit.erl
index d42ed1f..c15e934 100644
--- a/src/rebar_eunit.erl
+++ b/src/rebar_eunit.erl
@@ -291,17 +291,17 @@ cover_init(true, BeamFiles) ->
     %% to stdout. If the cover server is already started we'll reuse that
     %% pid.
     {ok, CoverPid} = case cover:start() of
-                         {ok, P} ->
-                             {ok, P};
+                         {ok, _P} = OkStart ->
+                             OkStart;
                          {error,{already_started, P}} ->
                              {ok, P};
-                         {error, Reason} ->
-                             {error, Reason}
+                         {error, _Reason} = ErrorStart ->
+                             ErrorStart
                      end,
 
-    {ok, F} = file:open(
-                filename:join([?EUNIT_DIR, "cover.log"]),
-                [write]),
+    {ok, F} = OkOpen = file:open(
+                         filename:join([?EUNIT_DIR, "cover.log"]),
+                         [write]),
 
     group_leader(F, CoverPid),
 
@@ -327,7 +327,7 @@ cover_init(true, BeamFiles) ->
                                  [Beam, Desc])
                 end,
             _ = [PrintWarning(Beam, Desc) || {Beam, {error, Desc}} <- Compiled],
-            {ok, F}
+            OkOpen
     end;
 cover_init(Config, BeamFiles) ->
     cover_init(rebar_config:get(Config, cover_enabled, false), BeamFiles).
diff --git a/src/rebar_utils.erl b/src/rebar_utils.erl
index 8db2df2..ca254eb 100644
--- a/src/rebar_utils.erl
+++ b/src/rebar_utils.erl
@@ -187,13 +187,12 @@ expand_code_path() ->
 %% The end of form $FOO is delimited with whitespace or eol
 %%
 expand_env_variable(InStr, VarName, RawVarValue) ->
-    VarValue = re:replace(RawVarValue, "\\\\", "\\\\\\\\",
-                          [global, {return, list}]),
+    ReOpts = [global, {return, list}],
+    VarValue = re:replace(RawVarValue, "\\\\", "\\\\\\\\", ReOpts),
     R1 = re:replace(InStr, "\\\$" ++ VarName ++ "\\s", VarValue ++ " ",
                     [global]),
     R2 = re:replace(R1, "\\\$" ++ VarName ++ "\$", VarValue),
-    re:replace(R2, "\\\${" ++ VarName ++ "}", VarValue,
-               [global, {return, list}]).
+    re:replace(R2, "\\\${" ++ VarName ++ "}", VarValue, ReOpts).
 
 
 %% ====================================================================