Where have all my bubbles gone

[wick]

After about 10 days my beer brew looks almost flat in the test tube ,there where bubbles at day 7, S.G. is now 1008 is this normal

[Pollux]

Once the primary fermentation has finished, the CO2 will continue to leave the solution, and therefore make your test samples seem flat.

Not a problem though, afterall you don't need to worry about carbonation until you bottle/keg.