[replace] breaks cargo test -p dependency

[gkoz]

$ cargo -V
cargo 0.11.0-nightly (afac7fc 2016-04-27)
$ echo '
[replace]
"libc:0.2.11" = { path = "../libc" }
' >> Cargo.toml
$ cargo test -p libc
error: could not find package matching spec `libc`

STR

cargo new libc
sed -i'' 's/0\.1\.0/0.2.11/' libc/Cargo.toml 
cargo new foo
cd foo
cat <<EOF >> Cargo.toml
[dependencies.libc]
version = "=0.2.11"

[replace]
"libc:0.2.11" = { path = "../libc" }
EOF
cargo build
cargo test -p libc