--- a/tests/test-perror.sh	Sun Mar 10 01:28:42 2019 +0100
+++ b/tests/test-perror.sh	Sun Mar 10 11:32:11 2019 +0100
@@ -5,22 +5,22 @@
 # Test NULL prefix. Result should not contain a number, except in lines that
 # start with 'EDC' (IBM z/OS libc produces an error identifier before the
 # error message).
-test-perror 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror.tmp
+${CHECKER} test-perror 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror.tmp
 grep -v '^EDC' t-perror.tmp | grep '[0-9]' > /dev/null \
   && fail_ "result should not contain a number"
 
 # Test empty prefix. Result should be the same.
-test-perror '' 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror1.tmp
+${CHECKER} test-perror '' 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror1.tmp
 diff t-perror.tmp t-perror1.tmp \
   || fail_ "empty prefix should behave like NULL argument"
 
 # Test non-empty prefix.
-test-perror foo 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror3.tmp
+${CHECKER} test-perror foo 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror3.tmp
 sed -e 's/^/foo: /' < t-perror.tmp > t-perror2.tmp
 diff t-perror2.tmp t-perror3.tmp || fail_ "prefix applied incorrectly"
 
 # Test exit status.
-test-perror >out 2>/dev/null || fail_ "unexpected exit status"
+${CHECKER} test-perror >out 2>/dev/null || fail_ "unexpected exit status"
 test -s out && fail_ "unexpected output"
 
 Exit 0