diff --git a/.github/workflows/GnuTests.yml b/.github/workflows/GnuTests.yml
index b47b435962f..2e496a08bb0 100644
--- a/.github/workflows/GnuTests.yml
+++ b/.github/workflows/GnuTests.yml
@@ -116,6 +116,7 @@ jobs:
         sudo locale-gen --keep-existing sv_SE.UTF-8
         sudo locale-gen --keep-existing en_US
         sudo locale-gen --keep-existing ru_RU.KOI8-R
+        sudo locale-gen --keep-existing en_US.UTF-8
 
         sudo update-locale
         echo "After:"