diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index b16e3b2a7..36318d69b 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -113,7 +113,7 @@ def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
         refresh_token: token.refresh_token,
         created_at: DateTime.to_unix(inserted_at),
         expires_in: 60 * 10,
-        scope: Enum.join(token.scopes)
+        scope: Enum.join(token.scopes, " ")
       }
 
       json(conn, response)
diff --git a/test/web/oauth/oauth_controller_test.exs b/test/web/oauth/oauth_controller_test.exs
index 53d83e6e8..ed94416ff 100644
--- a/test/web/oauth/oauth_controller_test.exs
+++ b/test/web/oauth/oauth_controller_test.exs
@@ -165,10 +165,10 @@ test "issues a token for `password` grant_type with valid credentials, with full
 
   test "issues a token for request with HTTP basic auth client credentials" do
     user = insert(:user)
-    app = insert(:oauth_app, scopes: ["scope1", "scope2"])
+    app = insert(:oauth_app, scopes: ["scope1", "scope2", "scope3"])
 
-    {:ok, auth} = Authorization.create_authorization(app, user, ["scope2"])
-    assert auth.scopes == ["scope2"]
+    {:ok, auth} = Authorization.create_authorization(app, user, ["scope1", "scope2"])
+    assert auth.scopes == ["scope1", "scope2"]
 
     app_encoded =
       (URI.encode_www_form(app.client_id) <> ":" <> URI.encode_www_form(app.client_secret))
@@ -183,11 +183,13 @@ test "issues a token for request with HTTP basic auth client credentials" do
         "redirect_uri" => app.redirect_uris
       })
 
-    assert %{"access_token" => token} = json_response(conn, 200)
+    assert %{"access_token" => token, "scope" => scope} = json_response(conn, 200)
+
+    assert scope == "scope1 scope2"
 
     token = Repo.get_by(Token, token: token)
     assert token
-    assert token.scopes == ["scope2"]
+    assert token.scopes == ["scope1", "scope2"]
   end
 
   test "rejects token exchange with invalid client credentials" do