diff --git a/Rakefile b/Rakefile
index 5307cbf..39b35bd 100644
--- a/Rakefile
+++ b/Rakefile
@@ -34,6 +34,7 @@ CLEAN.include FileList['*.dat*']
 CLEAN.include FileList['*.tar.gz']
 CLEAN.include FileList['*.txt.*']
 CLEAN.include FileList['*.csv.*']
+CLEAN.include FileList['*.zip.*']
 CLEAN.include FileList['ruby*.tmp']
 CLEAN.include FileList['data/download']
 CLEAN.include FileList['duplicate_ean13_from_zur_rose.txt']
diff --git a/test_options.rb b/test_options.rb
index 670058a..e2044e9 100755
--- a/test_options.rb
+++ b/test_options.rb
@@ -30,7 +30,7 @@ def test_one_call(cmd)
 end
 
 def prepare_for_gem_test
-  [ "rake clean gem"      , # build our gem first
+  [ "rake clean gem install"      , # build  and install our gem first
 #    "gem uninstall --all --ignore-dependencies --executables",
     "gem install pkg/*.gem"
   ].each {