diff --git a/tests/data/test1034 b/tests/data/test1034
index eda13bb23e..cf4d1b2408 100644
--- a/tests/data/test1034
+++ b/tests/data/test1034
@@ -28,9 +28,6 @@ http
 proxy
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 HTTP over proxy with malformatted IDN host name
 </name>
diff --git a/tests/data/test1035 b/tests/data/test1035
index c8eb282aff..622bb91dde 100644
--- a/tests/data/test1035
+++ b/tests/data/test1035
@@ -26,9 +26,6 @@ http
 proxy
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 HTTP over proxy with too long IDN host name
 </name>
diff --git a/tests/data/test955 b/tests/data/test955
index 633c2e369d..7585a8abb5 100644
--- a/tests/data/test955
+++ b/tests/data/test955
@@ -23,9 +23,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP without SMTPUTF8 support - UTF-8 based sender (local part only)
 </name>
diff --git a/tests/data/test956 b/tests/data/test956
index 9472e96e15..2211291ea7 100644
--- a/tests/data/test956
+++ b/tests/data/test956
@@ -20,9 +20,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP without SMTPUTF8 support - UTF-8 based recipient (local part only)
 </name>
diff --git a/tests/data/test957 b/tests/data/test957
index 671d73bbf2..bcb61983a4 100644
--- a/tests/data/test957
+++ b/tests/data/test957
@@ -21,9 +21,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP VRFY without SMTPUTF8 support - UTF-8 recipient (local part only)
 </name>
diff --git a/tests/data/test958 b/tests/data/test958
index 203254bfc2..6cb04dcd2e 100644
--- a/tests/data/test958
+++ b/tests/data/test958
@@ -21,9 +21,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP external VRFY without SMTPUTF8 - UTF-8 recipient (local part only)
 </name>
diff --git a/tests/data/test959 b/tests/data/test959
index 5693e34944..e04da87d3e 100644
--- a/tests/data/test959
+++ b/tests/data/test959
@@ -24,9 +24,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP without SMTPUTF8 support - UTF-8 based sender (host part only)
 </name>
diff --git a/tests/data/test960 b/tests/data/test960
index ced2ba0b54..e8ba21f982 100644
--- a/tests/data/test960
+++ b/tests/data/test960
@@ -21,9 +21,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP without SMTPUTF8 support - UTF-8 based recipient (host part only)
 </name>
diff --git a/tests/data/test961 b/tests/data/test961
index c52d5df344..18ff9dc044 100644
--- a/tests/data/test961
+++ b/tests/data/test961
@@ -22,9 +22,6 @@ smtp
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP external VRFY without SMTPUTF8 - UTF-8 recipient (host part only)
 </name>
diff --git a/tests/data/test968 b/tests/data/test968
index 4df600483b..158c6a958d 100644
--- a/tests/data/test968
+++ b/tests/data/test968
@@ -26,9 +26,6 @@ IDN
 !win32
 codeset-utf8
 </features>
-<setenv>
-LC_ALL=C.UTF-8
-</setenv>
 <name>
 SMTP VRFY with SMTPUTF8 support
 </name>