diff --git a/tests/pcre-count b/tests/pcre-count
--- a/tests/pcre-count
+++ b/tests/pcre-count
@@ -13,11 +13,17 @@ require_pcre_
 
 fail=0
 
-printf 'a\n%032768d\nb\x0\n%032768d\na\n' 0 0 > in
+printf 'a\n%032768d\nb\0\n%032768d\na\n' 0 0 > in || framework_failure_
 
-LC_ALL=C grep -P 'a' in | wc -l > exp
+# grep will discover that the input is a binary file sooner if the
+# page size is larger, so allow for either possible output.
+printf 'a\nBinary file in matches\n' >exp1a || framework_failure_
+printf 'Binary file in matches\n' >exp1b || framework_failure_
+LC_ALL=C grep -P 'a' in >out || fail=1
+compare exp1a out || compare exp1b out || fail=1
 
-LC_ALL=C grep -Pc 'a' in > out ||  fail=1
-compare exp out || fail=1
+printf '2\n' >exp2 || framework_failure_
+LC_ALL=C grep -Pc 'a' in >out || fail=1
+compare exp2 out || fail=1
 
 Exit $fail