diff --git a/tests/data/test1448 b/tests/data/test1448
index e04f47bde3..8de2fd1c6d 100644
--- a/tests/data/test1448
+++ b/tests/data/test1448
@@ -41,7 +41,7 @@ http
 idn
 </features>
 <setenv>
-LC_ALL=
+LC_ALL=en_US.UTF-8
 LC_CTYPE=en_US.UTF-8
 </setenv>
 <precheck>
diff --git a/tests/data/test2046 b/tests/data/test2046
index dcd202f044..ec49c86398 100644
--- a/tests/data/test2046
+++ b/tests/data/test2046
@@ -41,7 +41,7 @@ http
 idn
 </features>
 <setenv>
-LC_ALL=
+LC_ALL=en_US.UTF-8
 LC_CTYPE=en_US.UTF-8
 </setenv>
 <precheck>
diff --git a/tests/data/test2047 b/tests/data/test2047
index bc73509714..d3654c785a 100644
--- a/tests/data/test2047
+++ b/tests/data/test2047
@@ -42,7 +42,7 @@ http
 idn
 </features>
 <setenv>
-LC_ALL=
+LC_ALL=en_US.UTF-8
 LC_CTYPE=en_US.UTF-8
 </setenv>
 <precheck>