1 files changed, 2 insertions, 2 deletions
diff --git a/lib/gitlab/ci/trace.rb b/lib/gitlab/ci/trace.rb
index 6554c924e5c..e4f924d2fe4 100644
--- a/lib/gitlab/ci/trace.rb
+++ b/lib/gitlab/ci/trace.rb
@@ -43,7 +43,7 @@ module Gitlab
       end
 
       def append(data, offset)
-        write do |stream|
+        write('a+b') do |stream|
           current_length = stream.size
           return -current_length unless current_length == offset
 
@@ -75,7 +75,7 @@ module Gitlab
         stream&.close
       end
 
-      def write(mode = 'a+b')
+      def write(mode)
         stream = Gitlab::Ci::Trace::Stream.new do
           if current_path
             File.open(current_path, mode)