diff --git a/melos.yaml b/melos.yaml
index 256370441..c2d73fcdb 100644
--- a/melos.yaml
+++ b/melos.yaml
@@ -36,6 +36,7 @@ scripts:
     description: Run flutter test for all packages.
     run: flutter test --coverage
     exec:
+      concurrency: 6
       failFast: true
     packageFilters:
       dirExists:
diff --git a/packages/deriv_passkeys/analysis_options.yaml b/packages/deriv_passkeys/analysis_options.yaml
index fb40ccd5d..aea7c9654 100644
--- a/packages/deriv_passkeys/analysis_options.yaml
+++ b/packages/deriv_passkeys/analysis_options.yaml
@@ -7,7 +7,6 @@ linter:
     - always_declare_return_types
     - always_put_control_body_on_new_line
     - always_put_required_named_parameters_first
-    - always_require_non_null_named_parameters
     - always_specify_types
     - annotate_overrides
     - avoid_bool_literals_in_conditional_expressions
@@ -24,8 +23,6 @@ linter:
     - avoid_relative_lib_imports
     - avoid_renaming_method_parameters
     - avoid_return_types_on_setters
-    - avoid_returning_null
-    - avoid_returning_null_for_future
     - avoid_returning_null_for_void
     - avoid_setters_without_getters
     - avoid_shadowing_type_parameters