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-rw-r--r--GNUmakefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/GNUmakefile b/GNUmakefile
index a1b49b2..a23e29e 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -13,7 +13,7 @@ test_units := $(wildcard test/test_*.rb)
 test: test-unit
 test-unit: $(test_units)
 $(test_units):
-        $(RUBY) -I $(lib) $@ $(RUBY_TEST_OPTS)
+        $(RUBY) -w -I $(lib) $@ $(RUBY_TEST_OPTS)
 
 check-warnings:
         @(for i in $$(git ls-files '*.rb'| grep -v '^setup\.rb$$'); \