The test failed on branch=master, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/follower-reads/survival=region/locality=global/reads=strong/run_1
	follower_reads.go:657,follower_reads.go:319,follower_reads.go:57,test_runner.go:777: too many intervals with more than 2 nodes with low follower read ratios: 5 intervals > 4 threshold. Bad intervals:
		interval 09:31:30-09:31:40: n1 ratio: 1.072 n2 ratio: 0.480 n3 ratio: 0.626 n4 ratio: 0.977 n5 ratio: 0.259 n6 ratio: 0.978 
		interval 09:31:40-09:31:50: n1 ratio: 0.655 n2 ratio: 0.000 n3 ratio: 1.356 n4 ratio: 1.000 n5 ratio: 0.073 n6 ratio: 0.993 
		interval 09:32:40-09:32:50: n1 ratio: 0.006 n2 ratio: 0.377 n3 ratio: 0.609 n4 ratio: 0.979 n5 ratio: 0.968 n6 ratio: 0.986 
		interval 09:33:40-09:33:50: n1 ratio: 0.000 n2 ratio: 0.462 n3 ratio: 0.633 n4 ratio: 0.979 n5 ratio: 0.977 n6 ratio: 0.979 
		interval 09:34:40-09:34:50: n1 ratio: 0.220 n2 ratio: 0.282 n3 ratio: 0.599 n4 ratio: 0.991 n5 ratio: 0.986 n6 ratio: 0.986