diff --git a/tests/Vault.elm b/tests/Vault.elm
new file mode 100644
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--- /dev/null
+++ b/tests/Vault.elm
@@ -0,0 +1,45 @@
+module Vault exposing (..)
+
+import Expect
+import Fuzz exposing (Fuzzer)
+import Matrix
+import Matrix.Settings
+import Test exposing (..)
+import Types
+import Internal.Values.Envelope as Envelope
+import Internal.Config.Default as Default
+
+fuzzer : Fuzzer Matrix.Vault
+fuzzer =
+    Fuzz.constant <| Types.Vault <| Envelope.init {}
+
+settings : Test
+settings =
+    describe "Edit settings"
+        [ fuzz fuzzer "Default device name"
+            (\vault ->
+                vault
+                    |> Matrix.Settings.getDeviceName
+                    |> Expect.equal Default.deviceName
+            )
+        , fuzz2 fuzzer Fuzz.string "Set device name"
+            (\vault name ->
+                vault
+                    |> Matrix.Settings.setDeviceName name
+                    |> Matrix.Settings.getDeviceName
+                    |> Expect.equal name
+            )
+        , fuzz fuzzer "Default sync time"
+            (\vault ->
+                vault
+                    |> Matrix.Settings.getSyncTime
+                    |> Expect.equal Default.syncTime
+            )
+        , fuzz2 fuzzer Fuzz.int "Set sync time"
+            (\vault sync ->
+                vault
+                    |> Matrix.Settings.setSyncTime sync
+                    |> Matrix.Settings.getSyncTime
+                    |> Expect.equal sync
+            )
+        ]
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