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-rw-r--r--test/testutil.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/test/testutil.h b/test/testutil.h
index a247f55ed6..c23ad558c9 100644
--- a/test/testutil.h
+++ b/test/testutil.h
@@ -562,6 +562,10 @@ void test_perror(const char *s);
extern BIO *bio_out;
extern BIO *bio_err;
+/* Thread local BIO overrides. */
+int set_override_bio_out(BIO *bio);
+int set_override_bio_err(BIO *bio);
+
/*
* Formatted output for strings, memory and bignums.
*/