In Test cricket, the usual aim is to score as high a total as possible. As the overs are unlimited, a batsman can take his time to score runs. In general, 90 overs have to be bowled per day in Test match cricket. The openers or the starting batsmen in Test cricket are often chosen for their sound technique and ability to defend their wicket, because the first 1–2 hours of an innings, especially if it begins in the morning, are usually characterised by good conditions for bowling, specifically in terms of the pace and bounce of the pitch and the lateral movement of the ball in the air.
The one-drop batsman is usually also chosen for his sound technique, so as to stabilise his end in case an opener gets out. The middle order of a batting team in Test matches usually includes its most skilled batsmen in terms of shot-playing ability, because during the middle overs of a day batting is relatively easier than in the initial stages of the innings. If the batting innings of a team begins after the last half hour of the day, the team might employ a nightwatchman to bat after a batsman gets out.
The nightwatchman is usually a lower-order batsman, able to protect his wicket primarily by defending dangerous balls and leaving non-dangerous ones rather than looking to produce a large number of runs for his team, but not a complete rabbit, liable to expose other batsmen late in a day. This move prevents a regular batsman from having to face the last few overs left in the day or bat early the following morning; however, some teams do not employ a nightwatchmen for various reasons, including a belief that middle-order batsmen should be able to protect their wicket in poor conditions as well as good, or a lack of defensively minded lower-order batsmen.
In the third innings, the batting team may score quickly to set a large target to the opposition. This scenario usually occurs on the fourth day's play. The batting captain decides how many overs he is prepared to allow the opposition to chase his total in their fourth innings. He usually declares his team's innings at a predetermined time on the fourth day so that they can bowl at least 20 overs on that day and 90 overs on the last day. A good number of overs to bowl at the opposition team in the fourth innings is essential because usually on the fourth and fifth days of a Test match conditions are good for bowling (especially slow bowling), with the pitch having experienced a fair degree of wear and tear. Thus, to make the target as difficult as possible, the batting side speeds up the run rate (runs per over) till the captain declares.
If, however, a batting team is significantly behind the opposition in terms of runs going into the fourth day of a Test match, typical strategy by the batting team involves playing defensively to avoid losing their wickets. This ensures that they occupy the most time until the match draws to a close on the fifth day, because if a team's innings does not end on the fifth day then the match is drawn, or a stalemate is reached. However, in trying to do so, if the said batting team manages to overhaul its deficit and gain a substantial lead (an excess of runs) over the opposition, the captain may consider declaring the innings so that he can "force" a victory on the final day, depending on the size of his lead, the readiness of his bowlers, and the state of the pitch.