diff --git a/src/github.com/mattn/go-sqlite3/sqlite3_func_crypt_test.go b/src/github.com/mattn/go-sqlite3/sqlite3_func_crypt_test.go
new file mode 100644
index 0000000..0329ca8
--- /dev/null
+++ b/src/github.com/mattn/go-sqlite3/sqlite3_func_crypt_test.go
@@ -0,0 +1,57 @@
+// Copyright (C) 2018 G.J.R. Timmer <gjr.timmer@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package sqlite3
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+)
+
+// TestCryptEncoders to increase coverage
+func TestCryptEncoders(t *testing.T) {
+	tests := []struct {
+		enc      string
+		salt     string
+		expected string
+	}{
+		{"sha1", "", "d033e22ae348aeb5660fc2140aec35850c4da997"},
+		{"sha256", "", "8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918"},
+		{"sha384", "", "9ca694a90285c034432c9550421b7b9dbd5c0f4b6673f05f6dbce58052ba20e4248041956ee8c9a2ec9f10290cdc0782"},
+		{"sha512", "", "c7ad44cbad762a5da0a452f9e854fdc1e0e7a52a38015f23f3eab1d80b931dd472634dfac71cd34ebc35d16ab7fb8a90c81f975113d6c7538dc69dd8de9077ec"},
+		{"ssha1", "salt", "9bc7aa55f08fdad935c3f8362d3f48bcf70eb280"},
+		{"ssha256", "salt", "f9a81477552594c79f2abc3fc099daa896a6e3a3590a55ffa392b6000412e80b"},
+		{"ssha384", "salt", "9ed776b477fcfc1b5e584989e8d770f5e17d98a7643546a63c2b07d4ab00f1348f6b8e73103d3a23554f727136e8c215"},
+		{"ssha512", "salt", "3c4a79782143337be4492be072abcfe979dd703c00541a8c39a0f3df4bab2029c050cf46fddc47090b5b04ac537b3e78189e3de16e601e859f95c51ac9f6dafb"},
+	}
+
+	for _, e := range tests {
+		var fn func(pass []byte, hash interface{}) []byte
+		switch e.enc {
+		case "sha1":
+			fn = CryptEncoderSHA1
+		case "ssha1":
+			fn = CryptEncoderSSHA1(e.salt)
+		case "sha256":
+			fn = CryptEncoderSHA256
+		case "ssha256":
+			fn = CryptEncoderSSHA256(e.salt)
+		case "sha384":
+			fn = CryptEncoderSHA384
+		case "ssha384":
+			fn = CryptEncoderSSHA384(e.salt)
+		case "sha512":
+			fn = CryptEncoderSHA512
+		case "ssha512":
+			fn = CryptEncoderSSHA512(e.salt)
+		}
+
+		h := fn([]byte("admin"), nil)
+		if strings.Compare(fmt.Sprintf("%x", h), e.expected) != 0 {
+			t.Fatalf("Invalid %s hash: expected: %s; got: %x", strings.ToUpper(e.enc), e.expected, h)
+		}
+	}
+}