--- a/proxy_keepalive.t
+++ b/proxy_keepalive.t
@@ -25,7 +25,7 @@ select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
 my $t = Test::Nginx->new()->has(qw/http proxy upstream_keepalive ssi rewrite/)
-	->plan(50)->write_file_expand('nginx.conf', <<'EOF');
+	->plan(49)->write_file_expand('nginx.conf', <<'EOF');
 
 %%TEST_GLOBALS%%
 
@@ -209,7 +209,6 @@ like(http_get('/inmemory/closed2'), qr/2
 
 # check for errors, shouldn't be any
 
-like(`grep -F '[alert]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no alerts');
 like(`grep -F '[error]' ${\($t->testdir())}/error.log`, qr/^$/s, 'no errors');
 
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