diff --git a/tests/data/test1034 b/tests/data/test1034
index 4bddf59bbb..c475740513 100644
--- a/tests/data/test1034
+++ b/tests/data/test1034
@@ -33,12 +33,7 @@ idn
 </features>
 <setenv>
 CHARSET=UTF-8
-LC_ALL=
-LC_CTYPE=UTF-8
 </setenv>
-<precheck>
-perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
-</precheck>
  <name>
 HTTP over proxy with malformatted IDN host name
  </name>
diff --git a/tests/data/test1035 b/tests/data/test1035
index 1be22a84a5..05172ec9a0 100644
--- a/tests/data/test1035
+++ b/tests/data/test1035
@@ -33,17 +33,13 @@ idn
 </features>
 <setenv>
 CHARSET=UTF-8
-LC_ALL=
-LC_CTYPE=UTF-8
+LANG=en_US.UTF-8
 </setenv>
-<precheck>
-perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
-</precheck>
  <name>
 HTTP over proxy with too long IDN host name
  </name>
  <command>
-http://too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local/page/1035 -x %HOSTIP:%HTTPPORT
+http://too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local/page/1035 -x %HOSTIP:%HTTPPORT
 </command>
 </client>
 
@@ -54,8 +50,8 @@ http://too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local/page/10
 ^User-Agent:.*
 </strip>
 <protocol>
-GET http://too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local/page/1035 HTTP/1.1
-Host: too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local
+GET http://too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local/page/1035 HTTP/1.1
+Host: too-long-IDN-name-cürl-rüles-la-la-la-dee-da-flooby-nooby.local
 Accept: */*
 Proxy-Connection: Keep-Alive
 
diff --git a/tests/data/test165 b/tests/data/test165
index 4d48c0c656..6fc0ad2d57 100644
--- a/tests/data/test165
+++ b/tests/data/test165
@@ -32,12 +32,8 @@ idn
 </features>
 <setenv>
 CHARSET=UTF-8
-LC_ALL=
-LC_CTYPE=UTF-8
+LANG=en_US.UTF-8
 </setenv>
-<precheck>
-perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
-</precheck>
  <name>
 HTTP over proxy with IDN host name
  </name>
diff --git a/tests/data/test2046 b/tests/data/test2046
index 135c4dac9b..0f0eb52c67 100644
--- a/tests/data/test2046
+++ b/tests/data/test2046
@@ -42,12 +42,8 @@ idn
 </features>
 <setenv>
 CHARSET=UTF-8
-LC_ALL=
-LC_CTYPE=UTF-8
+LANG=en_US.UTF-8
 </setenv>
-<precheck>
-perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
-</precheck>
  <name>
 Connection re-use with IDN host name
  </name>
diff --git a/tests/data/test2047 b/tests/data/test2047
index e5c122d1bb..f54a30af65 100644
--- a/tests/data/test2047
+++ b/tests/data/test2047
@@ -43,12 +43,8 @@ idn
 </features>
 <setenv>
 CHARSET=UTF-8
-LC_ALL=
-LC_CTYPE=UTF-8
+LANG=en_US.UTF-8
 </setenv>
-<precheck>
-perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
-</precheck>
  <name>
 Connection re-use with IDN host name over HTTP proxy
  </name>