diff --git a/tests/long-pattern-perf b/tests/long-pattern-perf
index c222c02..90d9738 100755
--- a/tests/long-pattern-perf
+++ b/tests/long-pattern-perf
@@ -30,9 +30,14 @@ seq 10000 100000 | tr -d '\012' > re-10x || framework_failure_
 base_ms=$(user_time_ 1 grep -f re in    ) || fail=1
 b10x_ms=$(user_time_ 1 grep -f re-10x in) || fail=1
 
+echo "base_ms: $base_ms"
+echo "b10x_ms: $b10x_ms"
+
 # Increasing the length of the regular expression by a factor
 # of 10 should cause no more than a 10x increase in duration.
 # However, we'll draw the line at 20x to avoid false-positives.
 expr $base_ms '<' $b10x_ms / 20 && fail=1
 
+echo "expr: `expr $b10x_ms / 20`"
+echo "expr_full: `expr $b10x_ms / 20`"
 Exit $fail