diff --git a/tests/newusers/23_create_user_error_negativ_UID/data/newusers.err b/tests/newusers/23_create_user_error_negativ_UID/data/newusers.err
index a157f9f1..d19a1814 100644
--- a/tests/newusers/23_create_user_error_negativ_UID/data/newusers.err
+++ b/tests/newusers/23_create_user_error_negativ_UID/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: user `-1' does not exist
+newusers: user '-1' does not exist
 newusers: line 1: can't create user
 newusers: error detected, changes ignored
diff --git a/tests/newusers/24_create_user_error_invalid_UID/data/newusers.err b/tests/newusers/24_create_user_error_invalid_UID/data/newusers.err
index d3c2cfa9..23e8a429 100644
--- a/tests/newusers/24_create_user_error_invalid_UID/data/newusers.err
+++ b/tests/newusers/24_create_user_error_invalid_UID/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: user ID `1foo' is not valid
+newusers: user ID '1foo' is not valid
 newusers: line 1: can't create user
 newusers: error detected, changes ignored
diff --git a/tests/newusers/25_create_user_error_no_remaining_UID/data/newusers.err b/tests/newusers/25_create_user_error_no_remaining_UID/data/newusers.err
index 015a42b4..e12137fb 100644
--- a/tests/newusers/25_create_user_error_no_remaining_UID/data/newusers.err
+++ b/tests/newusers/25_create_user_error_no_remaining_UID/data/newusers.err
@@ -1,3 +1,3 @@
-Can't get unique UID (no more available UIDs)
+newusers: Can't get unique UID (no more available UIDs)
 newusers: line 3: can't create user
 newusers: error detected, changes ignored
diff --git a/tests/newusers/26_create_user_error_no_remaining_GID/data/newusers.err b/tests/newusers/26_create_user_error_no_remaining_GID/data/newusers.err
index 51dbbb7e..1c506379 100644
--- a/tests/newusers/26_create_user_error_no_remaining_GID/data/newusers.err
+++ b/tests/newusers/26_create_user_error_no_remaining_GID/data/newusers.err
@@ -1,3 +1,3 @@
-Can't get unique GID (no more available GIDs)
+newusers: Can't get unique GID (no more available GIDs)
 newusers: line 3: can't create group
 newusers: error detected, changes ignored
diff --git a/tests/newusers/27_create_user_error_invalid_username/data/newusers.err b/tests/newusers/27_create_user_error_invalid_username/data/newusers.err
index ea72726d..1781a939 100644
--- a/tests/newusers/27_create_user_error_invalid_username/data/newusers.err
+++ b/tests/newusers/27_create_user_error_invalid_username/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: invalid group name `f o o'
+newusers: invalid group name 'f o o'
 newusers: line 1: can't create group
 newusers: error detected, changes ignored
diff --git a/tests/newusers/28_create_user_error_invalid_groupname/data/newusers.err b/tests/newusers/28_create_user_error_invalid_groupname/data/newusers.err
index ea72726d..1781a939 100644
--- a/tests/newusers/28_create_user_error_invalid_groupname/data/newusers.err
+++ b/tests/newusers/28_create_user_error_invalid_groupname/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: invalid group name `f o o'
+newusers: invalid group name 'f o o'
 newusers: line 1: can't create group
 newusers: error detected, changes ignored
diff --git a/tests/newusers/31_create_user_error_invalid_GID/data/newusers.err b/tests/newusers/31_create_user_error_invalid_GID/data/newusers.err
index ecee8fb9..51c6e42e 100644
--- a/tests/newusers/31_create_user_error_invalid_GID/data/newusers.err
+++ b/tests/newusers/31_create_user_error_invalid_GID/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: group ID `1foo' is not valid
+newusers: group ID '1foo' is not valid
 newusers: line 1: can't create group
 newusers: error detected, changes ignored
diff --git a/tests/newusers/32_create_user_error_gshadow_group_exists/data/newusers.err b/tests/newusers/32_create_user_error_gshadow_group_exists/data/newusers.err
index 6c918bf4..4d8ae702 100644
--- a/tests/newusers/32_create_user_error_gshadow_group_exists/data/newusers.err
+++ b/tests/newusers/32_create_user_error_gshadow_group_exists/data/newusers.err
@@ -1,3 +1,3 @@
-newusers: group bar is a shadow group, but does not exist in /etc/group
+newusers: group 'bar' is a shadow group, but does not exist in /etc/group
 newusers: line 1: can't create group
 newusers: error detected, changes ignored