Make test work with upstream cbehave
(tinydir bundles a modified version)

diff --git a/tests/file_open_test.c b/tests/file_open_test.c
index 3e659bc..9f6f88d 100644
--- a/tests/file_open_test.c
+++ b/tests/file_open_test.c
@@ -19,4 +19,7 @@ FEATURE(file_open, "File open")
 	SCENARIO_END
 FEATURE_END
 
-CBEHAVE_RUN("File open:", TEST_FEATURE(file_open))
+int main(void) {
+	cbehave_feature _cfeatures[] = {{feature_idx(file_open)}};
+	return cbehave_runner("File open:", _cfeatures);
+}
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<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/cvassistant.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-06 01:44:56 +0200'>2021-10-06</span></td><td><a href='/guix/commit/gnu/packages/cvassistant.scm?id=84527724333d44c6b42a9b9d1e0f9f2b73d483bd'>gnu: quazip: Update to 1.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/compression.scm (quazip): Redefine as an heir to the…
(quazip-0): …new name of the previous package definition.
Adjust all packages with quazip as input to use quazip-0.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>