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-rw-r--r--lib/minitest/unit.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/minitest/unit.rb b/lib/minitest/unit.rb
index 77176240c5..25cb65c54f 100644
--- a/lib/minitest/unit.rb
+++ b/lib/minitest/unit.rb
@@ -104,7 +104,7 @@ module MiniTest
msg = message(msg) { "Expected #{mu_pp(obj)} to be an instance of #{cls}, not #{obj.class}" }
flip = (Module === obj) && ! (Module === cls) # HACK for specs
obj, cls = cls, obj if flip
- assert cls === obj, msg
+ assert obj.instance_of?(obj), msg
end
def assert_kind_of cls, obj, msg = nil # TODO: merge with instance_of