diff --git a/leveldb/external_test.go b/leveldb/external_test.go
index 4bc3a91..53d6038 100644
--- a/leveldb/external_test.go
+++ b/leveldb/external_test.go
@@ -37,7 +37,7 @@
 				testutil.DoDBTesting(&t)
 				db.TestClose()
 				done <- true
-			}, 20.0)
+			}, 80.0)
 		})
 
 		Describe("read test", func() {
@@ -111,7 +111,7 @@
 
 				db.TestClose()
 				done <- true
-			}, 30.0)
+			}, 240.0)
 		})
 	})
 })
diff --git a/leveldb/iterator/indexed_iter_test.go b/leveldb/iterator/indexed_iter_test.go
index 72a7978..f37e34e 100644
--- a/leveldb/iterator/indexed_iter_test.go
+++ b/leveldb/iterator/indexed_iter_test.go
@@ -69,7 +69,7 @@
 					}
 					testutil.DoIteratorTesting(&t)
 					done <- true
-				}, 1.5)
+				}, 15.0)
 			}
 		}
 
diff --git a/leveldb/iterator/merged_iter_test.go b/leveldb/iterator/merged_iter_test.go
index e523b63..a992f79 100644
--- a/leveldb/iterator/merged_iter_test.go
+++ b/leveldb/iterator/merged_iter_test.go
@@ -49,7 +49,7 @@
 					}
 					testutil.DoIteratorTesting(&t)
 					done <- true
-				}, 1.5)
+				}, 15.0)
 			}
 		}
 
diff --git a/leveldb/testutil/kvtest.go b/leveldb/testutil/kvtest.go
index 19d29df..e6687d6 100644
--- a/leveldb/testutil/kvtest.go
+++ b/leveldb/testutil/kvtest.go
@@ -140,7 +140,7 @@
 			TestIter(db, nil, kv.Clone())
 		}
 		done <- true
-	}, 3.0)
+	}, 30.0)
 
 	It("Should iterates and seeks slice correctly", func(done Done) {
 		if db, ok := p.(NewIterator); ok {
@@ -162,7 +162,7 @@
 			})
 		}
 		done <- true
-	}, 50.0)
+	}, 200.0)
 
 	It("Should iterates and seeks slice correctly", func(done Done) {
 		if db, ok := p.(NewIterator); ok {
@@ -174,7 +174,7 @@
 			})
 		}
 		done <- true
-	}, 50.0)
+	}, 200.0)
 }
 
 func AllKeyValueTesting(rnd *rand.Rand, body, setup func(KeyValue) DB, teardown func(DB)) {