test/rdoc/test_rdoc_rdoc.rb leaves temporary files as follows.

% make test-all TESTS=test/rdoc/test_rdoc_rdoc.rb
./miniruby -I./lib -I.ext/common -I./- -r./ext/purelib.rb
./tool/runruby.rb --extout=.ext  -- "./test/runner.rb"
test/rdoc/test_rdoc_rdoc.rb
Loaded suite ./test/runner
Started
............
Finished in 0.029331 seconds.

12 tests, 25 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 22126
% echo /tmp/test*
/tmp/test_rdoc_rdoc20100424-6696-1dq3z2
/tmp/test_rdoc_rdoc20100424-6696-1ga5psf
/tmp/test_rdoc_rdoc20100424-6696-8yr8hw
% ls /tmp/test*
/tmp/test_rdoc_rdoc20100424-6696-1dq3z2:

/tmp/test_rdoc_rdoc20100424-6696-1ga5psf:
created.rid

/tmp/test_rdoc_rdoc20100424-6696-8yr8hw:
created.rid
-- 
Tanaka Akira
JSBzdm4gZGlmZiAtLWRpZmYtY21kIGRpZmYgLXggLXUgdGVzdC9yZG9jL3Rlc3RfcmRvY19yZG9j
LnJiCkluZGV4OiB0ZXN0L3Jkb2MvdGVzdF9yZG9jX3Jkb2MucmIKPT09PT09PT09PT09PT09PT09
PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gdGVz
dC9yZG9jL3Rlc3RfcmRvY19yZG9jLnJiCShyZXZpc2lvbiAyNzQ3NSkKKysrIHRlc3QvcmRvYy90
ZXN0X3Jkb2NfcmRvYy5yYgkod29ya2luZyBjb3B5KQpAQCAtODIsNTAgKzgyLDQ3IEBACiAgIGVu
ZAogCiAgIGRlZiB0ZXN0X3NldHVwX291dHB1dF9kaXIKLSAgICBwYXRoID0gQHRlbXBmaWxlLnBh
dGgKLSAgICBAdGVtcGZpbGUudW5saW5rCisgICAgc2tpcCAiTm8gRGlyOjpta3RtcGRpciwgdXBn
cmFkZSB5b3VyIHJ1YnkiIHVubGVzcyBEaXIucmVzcG9uZF90bz8gOm1rdG1wZGlyCiAKLSAgICBs
YXN0ID0gQHJkb2Muc2V0dXBfb3V0cHV0X2RpciBwYXRoLCBmYWxzZQorICAgIERpci5ta3RtcGRp
ciB7fGR8CisgICAgICBwYXRoID0gRmlsZS5qb2luKGQsICd0ZXN0ZGlyJykKIAotICAgIGFzc2Vy
dF9lbXB0eSBsYXN0CisgICAgICBsYXN0ID0gQHJkb2Muc2V0dXBfb3V0cHV0X2RpciBwYXRoLCBm
YWxzZQogCi0gICAgYXNzZXJ0IEZpbGUuZGlyZWN0b3J5PyBwYXRoCi0gIGVuc3VyZQotICAgIEZp
bGVVdGlscy5ybV9mIHBhdGgKKyAgICAgIGFzc2VydF9lbXB0eSBsYXN0CisKKyAgICAgIGFzc2Vy
dCBGaWxlLmRpcmVjdG9yeT8gcGF0aAorICAgIH0KICAgZW5kCiAKICAgZGVmIHRlc3Rfc2V0dXBf
b3V0cHV0X2Rpcl9leGlzdHMKLSAgICBwYXRoID0gQHRlbXBmaWxlLnBhdGgKLSAgICBAdGVtcGZp
bGUudW5saW5rCi0gICAgRmlsZVV0aWxzLm1rZGlyX3AgcGF0aAorICAgIHNraXAgIk5vIERpcjo6
bWt0bXBkaXIsIHVwZ3JhZGUgeW91ciBydWJ5IiB1bmxlc3MgRGlyLnJlc3BvbmRfdG8/IDpta3Rt
cGRpcgogCi0gICAgb3BlbiBAcmRvYy5vdXRwdXRfZmxhZ19maWxlKHBhdGgpLCAndycgZG8gfGlv
fAotICAgICAgaW8ucHV0cyBUaW1lLmF0IDAKLSAgICAgIGlvLnB1dHMgIi4vbGliL3Jkb2MucmJc
dCN7VGltZS5hdCA4NjQwMH0iCi0gICAgZW5kCisgICAgRGlyLm1rdG1wZGlyIHt8cGF0aHwKKyAg
ICAgIG9wZW4gQHJkb2Mub3V0cHV0X2ZsYWdfZmlsZShwYXRoKSwgJ3cnIGRvIHxpb3wKKyAgICAg
ICAgaW8ucHV0cyBUaW1lLmF0IDAKKyAgICAgICAgaW8ucHV0cyAiLi9saWIvcmRvYy5yYlx0I3tU
aW1lLmF0IDg2NDAwfSIKKyAgICAgIGVuZAogCi0gICAgbGFzdCA9IEByZG9jLnNldHVwX291dHB1
dF9kaXIgcGF0aCwgZmFsc2UKKyAgICAgIGxhc3QgPSBAcmRvYy5zZXR1cF9vdXRwdXRfZGlyIHBh
dGgsIGZhbHNlCiAKLSAgICBhc3NlcnRfZXF1YWwgMSwgbGFzdC5zaXplCi0gICAgYXNzZXJ0X2Vx
dWFsIFRpbWUuYXQoODY0MDApLCBsYXN0WycuL2xpYi9yZG9jLnJiJ10KLSAgZW5zdXJlCi0gICAg
RmlsZVV0aWxzLnJtX2YgcGF0aAorICAgICAgYXNzZXJ0X2VxdWFsIDEsIGxhc3Quc2l6ZQorICAg
ICAgYXNzZXJ0X2VxdWFsIFRpbWUuYXQoODY0MDApLCBsYXN0WycuL2xpYi9yZG9jLnJiJ10KKyAg
ICB9CiAgIGVuZAogCiAgIGRlZiB0ZXN0X3NldHVwX291dHB1dF9kaXJfZXhpc3RzX2VtcHR5X2Ny
ZWF0ZWRfcmlkCi0gICAgcGF0aCA9IEB0ZW1wZmlsZS5wYXRoCi0gICAgQHRlbXBmaWxlLnVubGlu
awotICAgIEZpbGVVdGlscy5ta2Rpcl9wIHBhdGgKKyAgICBza2lwICJObyBEaXI6Om1rdG1wZGly
LCB1cGdyYWRlIHlvdXIgcnVieSIgdW5sZXNzIERpci5yZXNwb25kX3RvPyA6bWt0bXBkaXIKIAot
ICAgIG9wZW4gQHJkb2Mub3V0cHV0X2ZsYWdfZmlsZShwYXRoKSwgJ3cnIGRvIGVuZAorICAgIERp
ci5ta3RtcGRpciB7fHBhdGh8CisgICAgICBvcGVuIEByZG9jLm91dHB1dF9mbGFnX2ZpbGUocGF0
aCksICd3JyBkbyBlbmQKIAotICAgIGUgPSBhc3NlcnRfcmFpc2VzIFJEb2M6OkVycm9yIGRvCi0g
ICAgICBAcmRvYy5zZXR1cF9vdXRwdXRfZGlyIHBhdGgsIGZhbHNlCi0gICAgZW5kCisgICAgICBl
ID0gYXNzZXJ0X3JhaXNlcyBSRG9jOjpFcnJvciBkbworICAgICAgICBAcmRvYy5zZXR1cF9vdXRw
dXRfZGlyIHBhdGgsIGZhbHNlCisgICAgICBlbmQKIAotICAgIGFzc2VydF9tYXRjaCAlciVEaXJl
Y3RvcnkgI3tSZWdleHAuZXNjYXBlIHBhdGh9IGFscmVhZHkgZXhpc3RzJSwgZS5tZXNzYWdlCi0g
IGVuc3VyZQotICAgIEZpbGVVdGlscy5ybV9mIHBhdGgKKyAgICAgIGFzc2VydF9tYXRjaCAlciVE
aXJlY3RvcnkgI3tSZWdleHAuZXNjYXBlIHBhdGh9IGFscmVhZHkgZXhpc3RzJSwgZS5tZXNzYWdl
CisgICAgfQogICBlbmQKIAogICBkZWYgdGVzdF9zZXR1cF9vdXRwdXRfZGlyX2V4aXN0c19maWxl
Cg==