diff --git a/consensus/clique/snapshot_test.go b/consensus/clique/snapshot_test.go
index d651fbd6ed..5ac730c9e7 100644
--- a/consensus/clique/snapshot_test.go
+++ b/consensus/clique/snapshot_test.go
@@ -37,9 +37,6 @@ type testerVote struct {
 	auth   bool
 }
 
-// blockPeriod is the default minimum difference between two consecutive block's timestamps
-var blockPeriod = uint64(15)
-
 // testerAccountPool is a pool to maintain currently active tester accounts,
 // mapped from textual names used in the tests below to actual Ethereum private
 // keys capable of signing transactions.
@@ -363,7 +360,7 @@ func TestVoting(t *testing.T) {
 		for j, vote := range tt.votes {
 			headers[j] = &types.Header{
 				Number:   big.NewInt(int64(j) + 1),
-				Time:     big.NewInt(int64(j) * int64(blockPeriod)),
+				Time:     big.NewInt(int64(j) * 15),
 				Coinbase: accounts.address(vote.voted),
 				Extra:    make([]byte, extraVanity+extraSeal),
 			}