diff --git a/leveldb.nimble b/leveldb.nimble
new file mode 100644
index 0000000..599dec8
--- /dev/null
+++ b/leveldb.nimble
@@ -0,0 +1,13 @@
+# Package
+
+version       = "0.2.0"
+author        = "Michał Zieliński"
+description   = "LevelDB wrapper for Nim"
+license       = "MIT"
+srcDir        = "src"
+binDir        = "bin"
+bin           = @["leveldb"]
+
+# Dependencies
+
+requires "nim >= 1.0.0"
diff --git a/leveldb.nim b/src/leveldb.nim
similarity index 77%
rename from leveldb.nim
rename to src/leveldb.nim
index 9f341fe..b0da220 100644
--- a/leveldb.nim
+++ b/src/leveldb.nim
@@ -1,7 +1,5 @@
 import options, leveldb/raw
 
-proc free(p: pointer) {.importc.}
-
 type
   LevelDb* = ref object
     db: ptr leveldb_t
@@ -15,6 +13,8 @@ const
   levelDbTrue = uint8(1)
   levelDbFalse = uint8(0)
 
+proc free(p: pointer) {.importc.}
+
 proc checkError(errPtr: cstring) =
   if errPtr != nil:
     defer: free(errPtr)
@@ -127,47 +127,4 @@ proc removeDb*(name: string) =
   checkError(err)
 
 when isMainModule:
-  import sequtils
-
-  let env = leveldb_create_default_env()
-  let dbName = $(leveldb_env_get_test_directory(env))
-  let db = leveldb.open(dbName)
-
-  block version:
-    let (major, minor) = db.version()
-    doAssert major > 0
-    doAssert minor > 0
-
-  block getPutDelete:
-    doAssert db.get("hello") == none(string)
-    db.put("hello", "world")
-    doAssert db.get("hello") == some("world")
-    db.delete("hello")
-    doAssert db.get("hello") == none(string)
-
-  block iter:
-    db.put("aa", "1")
-    db.put("ba", "2")
-    db.put("bb", "3")
-
-    block iterNormal:
-      doAssert toSeq(db.iter()) ==
-               @[("aa", "1"), ("ba", "2"), ("bb", "3")]
-
-    block iterReverse:
-      doAssert toSeq(db.iter(reverse = true)) ==
-               @[("bb", "3"), ("ba", "2"), ("aa", "1")]
-
-    block iterSeek:
-      doAssert toSeq(db.iter(seek = "ab")) ==
-               @[("ba", "2"), ("bb", "3")]
-
-    block iterSeekReverse:
-      doAssert toSeq(db.iter(seek = "ab", reverse = true)) ==
-               @[("ba", "2"), ("aa", "1")]
-
-  block close:
-    db.close()
-
-  block remove:
-    removeDb(dbName)
+  discard
diff --git a/leveldb/raw.nim b/src/leveldb/raw.nim
similarity index 100%
rename from leveldb/raw.nim
rename to src/leveldb/raw.nim
diff --git a/tests/config.nims b/tests/config.nims
new file mode 100644
index 0000000..80091ff
--- /dev/null
+++ b/tests/config.nims
@@ -0,0 +1 @@
+switch("path", "$projectDir/../src")
diff --git a/tests/test.nim b/tests/test.nim
new file mode 100644
index 0000000..f43121d
--- /dev/null
+++ b/tests/test.nim
@@ -0,0 +1,54 @@
+import unittest, options, sequtils
+import leveldb, leveldb/raw
+
+suite "leveldb":
+
+  setup:
+    let env = leveldb_create_default_env()
+    let dbName = $(leveldb_env_get_test_directory(env))
+    let db = leveldb.open(dbName)
+
+  teardown:
+    db.close()
+    removeDb(dbName)
+
+  test "version":
+    let (major, minor) = db.version()
+    check(major > 0)
+    check(minor > 0)
+
+  test "get nothing":
+    check(db.get("nothing") == none(string))
+
+  test "put and get":
+    db.put("hello", "world")
+    check(db.get("hello") == some("world"))
+
+  test "delete":
+    db.put("hello", "world")
+    db.delete("hello")
+    check(db.get("hello") == none(string))
+
+  proc initData(db: LevelDb) =
+    db.put("aa", "1")
+    db.put("ba", "2")
+    db.put("bb", "3")
+
+  test "iter":
+    initData(db)
+    check(toSeq(db.iter()) == @[("aa", "1"), ("ba", "2"), ("bb", "3")])
+
+  test "iter reverse":
+    initData(db)
+    check(toSeq(db.iter(reverse = true)) ==
+          @[("bb", "3"), ("ba", "2"), ("aa", "1")])
+
+  test "iter seek":
+    initData(db)
+    check(toSeq(db.iter(seek = "ab")) ==
+          @[("ba", "2"), ("bb", "3")])
+
+  test "iter seek reverse":
+    initData(db)
+    check(toSeq(db.iter(seek = "ab", reverse = true)) ==
+          @[("ba", "2"), ("aa", "1")])