diff --git a/go.mod b/go.mod
index b83ab6a..e81cef1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,3 @@
 module github.com/cespare/xxhash/v2
 
-require (
-	github.com/OneOfOne/xxhash v1.2.2
-	github.com/cespare/xxhash v1.1.0 // indirect
-	github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72
-)
+go 1.13
diff --git a/go.sum b/go.sum
index a7f1832..e69de29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +0,0 @@
-github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
diff --git a/xxhash_test.go b/xxhash_test.go
index 6e7020c..414e34a 100644
--- a/xxhash_test.go
+++ b/xxhash_test.go
@@ -4,13 +4,8 @@
 	"bytes"
 	"encoding/binary"
 	"fmt"
-	"hash/crc32"
-	"hash/fnv"
 	"strings"
 	"testing"
-
-	OneOfOne "github.com/OneOfOne/xxhash"
-	"github.com/spaolacci/murmur3"
 )
 
 func TestAll(t *testing.T) {
@@ -134,6 +129,8 @@
 	}
 }
 
+var sink uint64
+
 func TestAllocs(t *testing.T) {
 	const shortStr = "abcdefghijklmnop"
 	// Sum64([]byte(shortString)) shouldn't allocate because the
@@ -163,151 +160,3 @@
 		t.Fatalf("got %d allocation(s) (want zero)", allocs)
 	}
 }
-
-var sink uint64
-
-var benchmarks = []struct {
-	name         string
-	directBytes  func([]byte) uint64
-	directString func(string) uint64
-	digestBytes  func([]byte) uint64
-	digestString func(string) uint64
-}{
-	{
-		name:         "xxhash",
-		directBytes:  Sum64,
-		directString: Sum64String,
-		digestBytes: func(b []byte) uint64 {
-			h := New()
-			h.Write(b)
-			return h.Sum64()
-		},
-		digestString: func(s string) uint64 {
-			h := New()
-			h.WriteString(s)
-			return h.Sum64()
-		},
-	},
-	{
-		name:         "OneOfOne",
-		directBytes:  OneOfOne.Checksum64,
-		directString: OneOfOne.ChecksumString64,
-		digestBytes: func(b []byte) uint64 {
-			h := OneOfOne.New64()
-			h.Write(b)
-			return h.Sum64()
-		},
-		digestString: func(s string) uint64 {
-			h := OneOfOne.New64()
-			h.WriteString(s)
-			return h.Sum64()
-		},
-	},
-	{
-		name:        "murmur3",
-		directBytes: murmur3.Sum64,
-		directString: func(s string) uint64 {
-			return murmur3.Sum64([]byte(s))
-		},
-		digestBytes: func(b []byte) uint64 {
-			h := murmur3.New64()
-			h.Write(b)
-			return h.Sum64()
-		},
-		digestString: func(s string) uint64 {
-			h := murmur3.New64()
-			h.Write([]byte(s))
-			return h.Sum64()
-		},
-	},
-	{
-		name: "CRC-32",
-		directBytes: func(b []byte) uint64 {
-			return uint64(crc32.ChecksumIEEE(b))
-		},
-		directString: func(s string) uint64 {
-			return uint64(crc32.ChecksumIEEE([]byte(s)))
-		},
-		digestBytes: func(b []byte) uint64 {
-			h := crc32.NewIEEE()
-			h.Write(b)
-			return uint64(h.Sum32())
-		},
-		digestString: func(s string) uint64 {
-			h := crc32.NewIEEE()
-			h.Write([]byte(s))
-			return uint64(h.Sum32())
-		},
-	},
-	{
-		name: "FNV-1a",
-		digestBytes: func(b []byte) uint64 {
-			h := fnv.New64()
-			h.Write(b)
-			return h.Sum64()
-		},
-		digestString: func(s string) uint64 {
-			h := fnv.New64a()
-			h.Write([]byte(s))
-			return h.Sum64()
-		},
-	},
-}
-
-func BenchmarkHashes(b *testing.B) {
-	for _, bb := range benchmarks {
-		for _, benchSize := range []struct {
-			name string
-			n    int
-		}{
-			{"5B", 5},
-			{"100B", 100},
-			{"4KB", 4e3},
-			{"10MB", 10e6},
-		} {
-			input := make([]byte, benchSize.n)
-			for i := range input {
-				input[i] = byte(i)
-			}
-			inputString := string(input)
-			if bb.directBytes != nil {
-				name := fmt.Sprintf("%s,direct,bytes,n=%s", bb.name, benchSize.name)
-				b.Run(name, func(b *testing.B) {
-					benchmarkHashBytes(b, input, bb.directBytes)
-				})
-			}
-			if bb.directString != nil {
-				name := fmt.Sprintf("%s,direct,string,n=%s", bb.name, benchSize.name)
-				b.Run(name, func(b *testing.B) {
-					benchmarkHashString(b, inputString, bb.directString)
-				})
-			}
-			if bb.digestBytes != nil {
-				name := fmt.Sprintf("%s,digest,bytes,n=%s", bb.name, benchSize.name)
-				b.Run(name, func(b *testing.B) {
-					benchmarkHashBytes(b, input, bb.digestBytes)
-				})
-			}
-			if bb.digestString != nil {
-				name := fmt.Sprintf("%s,digest,string,n=%s", bb.name, benchSize.name)
-				b.Run(name, func(b *testing.B) {
-					benchmarkHashString(b, inputString, bb.digestString)
-				})
-			}
-		}
-	}
-}
-
-func benchmarkHashBytes(b *testing.B, input []byte, fn func([]byte) uint64) {
-	b.SetBytes(int64(len(input)))
-	for i := 0; i < b.N; i++ {
-		sink = fn(input)
-	}
-}
-
-func benchmarkHashString(b *testing.B, input string, fn func(string) uint64) {
-	b.SetBytes(int64(len(input)))
-	for i := 0; i < b.N; i++ {
-		sink = fn(input)
-	}
-}
diff --git a/xxhashbench/go.mod b/xxhashbench/go.mod
new file mode 100644
index 0000000..f42f101
--- /dev/null
+++ b/xxhashbench/go.mod
@@ -0,0 +1,11 @@
+module github.com/cespare/xxhash/xxhashbench
+
+go 1.13
+
+require (
+	github.com/OneOfOne/xxhash v1.2.5
+	github.com/cespare/xxhash/v2 v2.0.0-00010101000000-000000000000
+	github.com/spaolacci/murmur3 v1.1.0
+)
+
+replace github.com/cespare/xxhash/v2 => ../
diff --git a/xxhashbench/go.sum b/xxhashbench/go.sum
new file mode 100644
index 0000000..8bf9bcd
--- /dev/null
+++ b/xxhashbench/go.sum
@@ -0,0 +1,6 @@
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/OneOfOne/xxhash v1.2.5 h1:zl/OfRA6nftbBK9qTohYBJ5xvw6C/oNKizR7cZGl3cI=
+github.com/OneOfOne/xxhash v1.2.5/go.mod h1:eZbhyaAYD41SGSSsnmcpxVoRiQ/MPUTjUdIIOT9Um7Q=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
+github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
+github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
diff --git a/xxhashbench/xxhashbench_test.go b/xxhashbench/xxhashbench_test.go
new file mode 100644
index 0000000..a73f69e
--- /dev/null
+++ b/xxhashbench/xxhashbench_test.go
@@ -0,0 +1,160 @@
+package xxhashbench
+
+import (
+	"fmt"
+	"hash/crc32"
+	"hash/fnv"
+	"testing"
+
+	OneOfOne "github.com/OneOfOne/xxhash"
+	"github.com/cespare/xxhash/v2"
+	"github.com/spaolacci/murmur3"
+)
+
+var sink uint64
+
+var benchmarks = []struct {
+	name         string
+	directBytes  func([]byte) uint64
+	directString func(string) uint64
+	digestBytes  func([]byte) uint64
+	digestString func(string) uint64
+}{
+	{
+		name:         "xxhash",
+		directBytes:  xxhash.Sum64,
+		directString: xxhash.Sum64String,
+		digestBytes: func(b []byte) uint64 {
+			h := xxhash.New()
+			h.Write(b)
+			return h.Sum64()
+		},
+		digestString: func(s string) uint64 {
+			h := xxhash.New()
+			h.WriteString(s)
+			return h.Sum64()
+		},
+	},
+	{
+		name:         "OneOfOne",
+		directBytes:  OneOfOne.Checksum64,
+		directString: OneOfOne.ChecksumString64,
+		digestBytes: func(b []byte) uint64 {
+			h := OneOfOne.New64()
+			h.Write(b)
+			return h.Sum64()
+		},
+		digestString: func(s string) uint64 {
+			h := OneOfOne.New64()
+			h.WriteString(s)
+			return h.Sum64()
+		},
+	},
+	{
+		name:        "murmur3",
+		directBytes: murmur3.Sum64,
+		directString: func(s string) uint64 {
+			return murmur3.Sum64([]byte(s))
+		},
+		digestBytes: func(b []byte) uint64 {
+			h := murmur3.New64()
+			h.Write(b)
+			return h.Sum64()
+		},
+		digestString: func(s string) uint64 {
+			h := murmur3.New64()
+			h.Write([]byte(s))
+			return h.Sum64()
+		},
+	},
+	{
+		name: "CRC-32",
+		directBytes: func(b []byte) uint64 {
+			return uint64(crc32.ChecksumIEEE(b))
+		},
+		directString: func(s string) uint64 {
+			return uint64(crc32.ChecksumIEEE([]byte(s)))
+		},
+		digestBytes: func(b []byte) uint64 {
+			h := crc32.NewIEEE()
+			h.Write(b)
+			return uint64(h.Sum32())
+		},
+		digestString: func(s string) uint64 {
+			h := crc32.NewIEEE()
+			h.Write([]byte(s))
+			return uint64(h.Sum32())
+		},
+	},
+	{
+		name: "FNV-1a",
+		digestBytes: func(b []byte) uint64 {
+			h := fnv.New64()
+			h.Write(b)
+			return h.Sum64()
+		},
+		digestString: func(s string) uint64 {
+			h := fnv.New64a()
+			h.Write([]byte(s))
+			return h.Sum64()
+		},
+	},
+}
+
+func BenchmarkHashes(b *testing.B) {
+	for _, bb := range benchmarks {
+		for _, benchSize := range []struct {
+			name string
+			n    int
+		}{
+			{"5B", 5},
+			{"100B", 100},
+			{"4KB", 4e3},
+			{"10MB", 10e6},
+		} {
+			input := make([]byte, benchSize.n)
+			for i := range input {
+				input[i] = byte(i)
+			}
+			inputString := string(input)
+			if bb.directBytes != nil {
+				name := fmt.Sprintf("%s,direct,bytes,n=%s", bb.name, benchSize.name)
+				b.Run(name, func(b *testing.B) {
+					benchmarkHashBytes(b, input, bb.directBytes)
+				})
+			}
+			if bb.directString != nil {
+				name := fmt.Sprintf("%s,direct,string,n=%s", bb.name, benchSize.name)
+				b.Run(name, func(b *testing.B) {
+					benchmarkHashString(b, inputString, bb.directString)
+				})
+			}
+			if bb.digestBytes != nil {
+				name := fmt.Sprintf("%s,digest,bytes,n=%s", bb.name, benchSize.name)
+				b.Run(name, func(b *testing.B) {
+					benchmarkHashBytes(b, input, bb.digestBytes)
+				})
+			}
+			if bb.digestString != nil {
+				name := fmt.Sprintf("%s,digest,string,n=%s", bb.name, benchSize.name)
+				b.Run(name, func(b *testing.B) {
+					benchmarkHashString(b, inputString, bb.digestString)
+				})
+			}
+		}
+	}
+}
+
+func benchmarkHashBytes(b *testing.B, input []byte, fn func([]byte) uint64) {
+	b.SetBytes(int64(len(input)))
+	for i := 0; i < b.N; i++ {
+		sink = fn(input)
+	}
+}
+
+func benchmarkHashString(b *testing.B, input string, fn func(string) uint64) {
+	b.SetBytes(int64(len(input)))
+	for i := 0; i < b.N; i++ {
+		sink = fn(input)
+	}
+}