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-rw-r--r--GNUmakefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/GNUmakefile b/GNUmakefile
index 73e1a0c..c5d7f02 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -68,7 +68,7 @@ $(slow_tests):
 TEST_OPTS = -v
 run_test = @echo '*** $(arg)$(extra) ***'; \
   setsid $(ruby) $(arg) $(TEST_OPTS) >$(t) 2>&1 || \
-  (cat >&2 < $(t); exit 1)
+  (sed "s,^,$(extra): ," >&2 < $(t); exit 1)
 
 %.n: arg = $(subst .n,,$(subst --, -n ,$@))
 %.n: t = $(subst .n,$(log_suffix),$@)