diff --git a/inst/tinytest/test-ab.R b/inst/tinytest/test-ab.R
index 8181f8f27..84a6614db 100755
--- a/inst/tinytest/test-ab.R
+++ b/inst/tinytest/test-ab.R
@@ -85,7 +85,7 @@ expect_inherits(x[1], "ab")
 expect_inherits(x[[1]], "ab")
 expect_inherits(c(x[1], x[9]), "ab")
 expect_inherits(unique(x[1], x[9]), "ab")
-expect_inherits(rep(x[1], x[9]), "ab")
+expect_inherits(rep(x[1], 2), "ab")
 expect_warning(x[1] <- "invalid code")
 expect_warning(x[[1]] <- "invalid code")
 expect_warning(c(x[1], "test"))