+# ensure that the users learns about multiple versions too
+testsuccessequal "Listing...
+baz/unstable 2.0 all [upgradable from: 0.1]
+N: There are 2 additional versions. Please use the '-a' switch to see them." apt list baz -o quiet=0
+testsuccessequal 'Listing...
+baz/unstable 2.0 all [upgradable from: 0.1]
+baz/testing 1.0 all
+baz/now 0.1 all [installed,upgradable to: 2.0]
+' apt list baz -o quiet=0 -a
+
+# test format strings for machine parseable output
+testsuccessequal 'bar - 1.0 - 1.0
+baz - 0.1 - 2.0' apt list -qq bar baz -o APT::Cmd::use-format=true -o APT::Cmd::format="\${Package} - \${installed:Version} - \${candidate:Version}"