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-rw-r--r--lib/stdlib/test/io_SUITE.erl1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/stdlib/test/io_SUITE.erl b/lib/stdlib/test/io_SUITE.erl
index d29f4c016d..ac61e3753b 100644
--- a/lib/stdlib/test/io_SUITE.erl
+++ b/lib/stdlib/test/io_SUITE.erl
@@ -2005,6 +2005,7 @@ writes(N, F1) ->
format_string(_Config) ->
%% All but padding is tested by fmt/2.
+ "xxxxxxxsss" = fmt("~10..xs", ["sss"]),
"xxxxxxsssx" = fmt("~10.4.xs", ["sss"]),
"xxxxxxsssx" = fmt("~10.4.*s", [$x, "sss"]),
ok.