diff --git a/projects/firefox/build b/projects/firefox/build
index 907f09372261daf199f75091bfb4a0dd55a28a0d..53e4d8e3f29ad6761d3919776831161b6f2aa596 100644
--- a/projects/firefox/build
+++ b/projects/firefox/build
@@ -57,11 +57,13 @@ tar -C /var/tmp/build -xf [% project %]-[% c('version') %].tar.gz
 
 mkdir -p $distdir/[% IF ! c("var/macos") %]Browser[% END %]
 
-tar -xf $rootdir/[% c('input_files_by_name/translation-base-browser') %]
-transl_base_browser=$rootdir/translation-base-browser
-[% IF c("var/tor-browser") -%]
-  tar -xf $rootdir/[% c('input_files_by_name/translation-tor-browser') %]
-  transl_tor_browser=$rootdir/translation-tor-browser
+[% IF !c("var/testbuild") -%]
+  tar -xf $rootdir/[% c('input_files_by_name/translation-base-browser') %]
+  transl_base_browser=$rootdir/translation-base-browser
+  [% IF c("var/tor-browser") -%]
+    tar -xf $rootdir/[% c('input_files_by_name/translation-tor-browser') %]
+    transl_tor_browser=$rootdir/translation-tor-browser
+  [% END -%]
 [% END -%]
 
 cd /var/tmp/build/[% project %]-[% c("version") %]
@@ -116,7 +118,11 @@ add_translation () {
   echo "    locale/$lang/$filename (locale/$lang/$filename)" >> "browser/components/$component/jar.mn"
 }
 
-supported_locales="[% tmpl(c('var/locales').join(' ')) %]"
+[% IF c("var/testbuild") -%]
+  supported_locales=""
+[% ELSE -%]
+  supported_locales="[% tmpl(c('var/locales').join(' ')) %]"
+[% END -%]
 [% IF c("var/tor-browser") -%]
   torbutton_locales="toolkit/torbutton/chrome/locale/"
   torbutton_jar="toolkit/torbutton/jar.mn"
diff --git a/projects/firefox/config b/projects/firefox/config
index 606daff36a45935c2ae9b335c8e09b2350b32c56..144b09f023b6f1e693d3b6a0b8e11552bc2d7ae8 100644
--- a/projects/firefox/config
+++ b/projects/firefox/config
@@ -183,6 +183,7 @@ input_files:
   - project: translation
     name: translation-base-browser
     pkg_type: base-browser
+    enable: '[% !c("var/testbuild") %]'
   - project: translation
     name: translation-base-browser-fluent
     pkg_type: base-browser-fluent
@@ -190,7 +191,7 @@ input_files:
   - project: translation
     name: translation-tor-browser
     pkg_type: tor-browser
-    enable: '[% c("var/tor-browser") %]'
+    enable: '[% c("var/tor-browser") && !c("var/testbuild") %]'
   - filename: namecoin-torbutton.patch
     enable: '[% c("var/namecoin") %]'
     # TorButton patch authored by Arthur Edelstein, from https://github.com/arthuredelstein/torbutton/ branch 2.1.10-namecoin