diff --git a/Gemfile b/Gemfile
index 651cb0f53..38f352af3 100755
--- a/Gemfile
+++ b/Gemfile
@@ -35,7 +35,9 @@ gem "zero_downtime_migrations"
 group :development, :test do
   gem "thin"
   gem "capybara"
+  gem "deep-cover", "~> 0.4", require: false
   gem "codecov", require: false
+  gem "simplecov"
   gem "database_cleaner"
   gem "factory_bot_rails"
   gem "faker"
@@ -48,7 +50,6 @@ group :development, :test do
   gem "rspec-rails"
   gem "rspec"
   gem "selenium-webdriver"
-  gem "simplecov"
   gem "smarf_doc", git: "https://github.com/RickCarlino/smarf_doc.git"
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 41b125bde..c6831c127 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,7 +57,11 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     amq-protocol (2.3.0)
     arel (9.0.0)
+    ast (2.4.0)
+    backports (3.11.3)
     bcrypt (3.1.12)
+    binding_of_caller (0.8.0)
+      debug_inspector (>= 0.0.1)
     builder (3.2.3)
     bunny (2.11.0)
       amq-protocol (~> 2.3.0)
@@ -83,8 +87,21 @@ GEM
     crass (1.0.4)
     daemons (1.2.6)
     database_cleaner (1.7.0)
+    debug_inspector (0.0.3)
     declarative (0.0.10)
     declarative-option (0.1.0)
+    deep-cover (0.6.2)
+      backports (>= 3.11.0)
+      binding_of_caller
+      bundler
+      highline
+      parser (~> 2.5.0)
+      pry
+      sass
+      slop (~> 4.0)
+      term-ansicolor
+      terminal-table
+      with_progress
     delayed_job (4.1.5)
       activesupport (>= 3.0, < 5.3)
     delayed_job_active_record (4.1.3)
@@ -158,6 +175,7 @@ GEM
       signet (~> 0.7)
     hashdiff (0.3.7)
     hashie (3.5.7)
+    highline (2.0.0)
     httpclient (2.8.3)
     i18n (1.0.1)
       concurrent-ruby (~> 1.0)
@@ -207,6 +225,8 @@ GEM
       mime-types
       mimemagic (~> 0.3.0)
       terrapin (~> 0.6.0)
+    parser (2.5.1.2)
+      ast (~> 2.4.0)
     passenger (5.3.3)
       rack
       rake (>= 0.8.1)
@@ -266,6 +286,9 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.3.1)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
     representable (3.0.4)
       declarative (< 0.1.0)
       declarative-option (< 0.2.0)
@@ -300,7 +323,13 @@ GEM
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
     ruby-graphviz (1.2.3)
+    ruby-progressbar (1.10.0)
     rubyzip (1.2.1)
+    sass (3.5.7)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     scenic (1.4.1)
       activerecord (>= 4.0.0)
       railties (>= 4.0.0)
@@ -322,6 +351,7 @@ GEM
       skylight-core (= 2.0.2)
     skylight-core (2.0.2)
       activesupport (>= 4.2.0)
+    slop (4.6.2)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -329,6 +359,10 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
+    term-ansicolor (1.6.0)
+      tins (~> 1.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
     terrapin (0.6.0)
       climate_control (>= 0.0.3, < 1.0)
     thin (1.7.2)
@@ -337,9 +371,11 @@ GEM
       rack (>= 1, < 3)
     thor (0.19.4)
     thread_safe (0.3.6)
+    tins (1.16.3)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     uber (0.1.0)
+    unicode-display_width (1.4.0)
     url (0.3.2)
     valid_url (0.0.4)
       addressable
@@ -351,6 +387,8 @@ GEM
     websocket-driver (0.7.0)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.3)
+    with_progress (1.0.1)
+      ruby-progressbar (~> 1.4)
     xpath (3.1.0)
       nokogiri (~> 1.8)
     zero_downtime_migrations (0.0.7)
@@ -365,6 +403,7 @@ DEPENDENCIES
   capybara
   codecov
   database_cleaner
+  deep-cover (~> 0.4)
   delayed_job
   delayed_job_active_record
   devise
diff --git a/app/controllers/api/abstract_controller.rb b/app/controllers/api/abstract_controller.rb
index bb65b797a..be9bb5dad 100644
--- a/app/controllers/api/abstract_controller.rb
+++ b/app/controllers/api/abstract_controller.rb
@@ -164,6 +164,7 @@ private
       # Attempt 1:
       #   The device is using an HTTP client that does not provide a user-agent.
       #   We will assume this is an old FBOS version and set it to 0.0.0
+      # TODO UNTESTED CODE: simplecov counts this as tested. It is not.
       return CalculateUpgrade::NULL if ua == NO_UA_FOUND
 
       # Attempt 2:
diff --git a/app/lib/celery_script/checker.rb b/app/lib/celery_script/checker.rb
index a073f5848..cea1b5437 100644
--- a/app/lib/celery_script/checker.rb
+++ b/app/lib/celery_script/checker.rb
@@ -103,6 +103,15 @@ module CeleryScript
       run_additional_validations(value, key)
     end
 
+    def type_check_parameter(var, expected)
+      data_type = var.args[:data_type].value
+      bad_var!(value, label, expected, actual) if !expected.include?(data_type)
+    end
+
+    def bad_var!(value, label, expected, actual)
+      value.invalidate!(T_MISMATCH % [label, expected, actual])
+    end
+
     def validate_node_pairing(key, value)
       actual  = value.kind
       allowed = corpus.fetchArg(key).allowed_values.map(&:to_s)
@@ -114,15 +123,18 @@ module CeleryScript
         # in depth type checking. We're not there yet, though.
         # Currently we just need `resolve_variable!` to
         # catch unbound identifiers
-        # data_type =
-          resolve_variable!(value)#.args[:data_type].value
-        # if !allowed_types.include?(data_type)
-        #   # Did it reolve?
-        #   #   YES: Make sure it resolves to a `kind` from the list above.
-        #   value.invalidate!(T_MISMATCH % [value.args["label"].value,
-        #                                     allowed_types,
-        #                                     data_type])
-        # end
+        var = resolve_variable!(value)
+        case var.kind
+        when "parameter_declaration"
+          type_check_parameter(var, allowed_types)
+        when "variable_declaration"
+          actual = var.args[:data_value].kind
+          unless allowed_types.include?(actual)
+            bad_var!(value, var.args[:label].value, allowed_types, actual)
+          end
+        else
+          raise ("Bad kind: " + var.kind)
+        end
       end
       ok      = allowed.include?(actual)
       raise TypeCheckError, (BAD_LEAF % [ value.kind,
diff --git a/app/lib/service_runner_base.rb b/app/lib/service_runner_base.rb
index 061a07a7a..5aeb890a1 100644
--- a/app/lib/service_runner_base.rb
+++ b/app/lib/service_runner_base.rb
@@ -17,8 +17,7 @@ class ServiceRunner
     @channel.subscribe(block: true) do |info, _, payl|
       @worker.process(info, payl.force_encoding("UTF-8"))
     end
-  rescue OFFLINE_ERROR => e
-  rescue StandardError => e
+  rescue OFFLINE_ERROR, StandardError => e
     unless e.is_a?(OFFLINE_ERROR)
       Rollbar.error(e)
       print CRASH_MSG
diff --git a/app/models/celery_script_settings_bag.rb b/app/models/celery_script_settings_bag.rb
index ea6567599..913e52943 100644
--- a/app/models/celery_script_settings_bag.rb
+++ b/app/models/celery_script_settings_bag.rb
@@ -208,7 +208,7 @@ module CeleryScriptSettingsBag
       .node(:channel,               [:channel_name])
       .node(:wait,                  [:milliseconds])
       .node(:send_message,          [:message, :message_type], [:channel])
-      .node(:execute,               [:sequence_id])
+      .node(:execute,               [:sequence_id], [:variable_declaration])
       .node(:_if,                   [:lhs, :op, :rhs, :_then, :_else], [:pair])
       .node(:sequence,              [:version, :locals], STEPS)
       .node(:home,                  [:speed, :axis], [])
diff --git a/app/models/token_issuance.rb b/app/models/token_issuance.rb
index db6f86dfb..bf21659ad 100644
--- a/app/models/token_issuance.rb
+++ b/app/models/token_issuance.rb
@@ -25,8 +25,7 @@ class TokenIssuance < ApplicationRecord
       id = "device_#{device_id}"
       Transport::Mgmt.try(:close_connections_for_username, id)
     end
-  rescue Faraday::ConnectionFailed
-  rescue Timeout::Error
+  rescue Faraday::ConnectionFailed, Timeout::Error
     Rollbar.error("Failed to evict clients on token revocation")
   end
 
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index 22e1d1e24..0108bb07f 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -1,257 +1,14 @@
-# Use this hook to configure devise mailer, warden hooks and so forth.
-# Many of these configuration options can be set straight in your model.
 Devise.setup do |config|
-  # The secret key used by Devise. Devise uses this key to generate
-  # random tokens. Changing this key will render invalid all existing
-  # confirmation, reset password and unlock tokens in the database.
-
   config.secret_key = ENV['DEVISE_SECRET']
-
-  # ==> Mailer Configuration
-  # Configure the e-mail address which will be shown in Devise::Mailer,
-  # note that it will be overwritten if you use your own mailer class
-  # with default "from" parameter.
   config.mailer_sender = 'do-not-reply@farmbot.io'
-
-  # Configure the class responsible to send e-mails.
-  # config.mailer = 'Devise::Mailer'
-
-  # ==> ORM configuration
   require 'devise/orm/active_record'
-
-  # ==> Configuration for any authentication mechanism
-  # Configure which keys are used when authenticating a user. The default is
-  # just :email. You can configure it to use [:username, :subdomain], so for
-  # authenticating a user, both parameters are required. Remember that those
-  # parameters are used only when authenticating and not when retrieving from
-  # session. If you need permissions, you should implement that in a before filter.
-  # You can also supply a hash where the value is a boolean determining whether
-  # or not authentication should be aborted when the value is not present.
-  # config.authentication_keys = [ :email ]
-
-  # Configure parameters from the request object used for authentication. Each entry
-  # given should be a request method and it will automatically be passed to the
-  # find_for_authentication method and considered in your model lookup. For instance,
-  # if you set :request_keys to [:subdomain], :subdomain will be used on authentication.
-  # The same considerations mentioned for authentication_keys also apply to request_keys.
-  # config.request_keys = []
-
-  # Configure which authentication keys should be case-insensitive.
-  # These keys will be downcased upon creating or modifying a user and when used
-  # to authenticate or find a user. Default is :email.
   config.case_insensitive_keys = [ :email ]
-
-  # Configure which authentication keys should have whitespace stripped.
-  # These keys will have whitespace before and after removed upon creating or
-  # modifying a user and when used to authenticate or find a user. Default is :email.
   config.strip_whitespace_keys = [ :email ]
-
-  # Tell if authentication through request.params is enabled. True by default.
-  # It can be set to an array that will enable params authentication only for the
-  # given strategies, for example, `config.params_authenticatable = [:database]` will
-  # enable it only for database (email + password) authentication.
-  # config.params_authenticatable = true
-
-  # Tell if authentication through HTTP Auth is enabled. False by default.
-  # It can be set to an array that will enable http authentication only for the
-  # given strategies, for example, `config.http_authenticatable = [:database]` will
-  # enable it only for database authentication. The supported strategies are:
-  # :database      = Support basic authentication with authentication key + password
-  # config.http_authenticatable = false
-
-  # If http headers should be returned for AJAX requests. True by default.
-  # config.http_authenticatable_on_xhr = true
-
-  # The realm used in Http Basic Authentication. 'Application' by default.
-  # config.http_authentication_realm = 'Application'
-
-  # It will change confirmation, password recovery and other workflows
-  # to behave the same regardless if the e-mail provided was right or wrong.
-  # Does not affect registerable.
-  # config.paranoid = true
-
-  # By default Devise will store the user in session. You can skip storage for
-  # particular strategies by setting this option.
-  # Notice that if you are skipping storage for all authentication paths, you
-  # may want to disable generating routes to Devise's sessions controller by
-  # passing skip: :sessions to `devise_for` in your config/routes.rb
   config.skip_session_storage = [:http_auth]
-
-  # By default, Devise cleans up the CSRF token on authentication to
-  # avoid CSRF token fixation attacks. This means that, when using AJAX
-  # requests for sign in and sign up, you need to get a new CSRF token
-  # from the server. You can disable this option at your own risk.
-  # config.clean_up_csrf_token_on_authentication = true
-
-  # ==> Configuration for :database_authenticatable
-  # For bcrypt, this is the cost for hashing the password and defaults to 10. If
-  # using other encryptors, it sets how many times you want the password re-encrypted.
-  #
-  # Limiting the stretches to just one in testing will increase the performance of
-  # your test suite dramatically. However, it is STRONGLY RECOMMENDED to not use
-  # a value less than 10 in other environments. Note that, for bcrypt (the default
-  # encryptor), the cost increases exponentially with the number of stretches (e.g.
-  # a value of 20 is already extremely slow: approx. 60 seconds for 1 calculation).
   config.stretches = Rails.env.test? ? 1 : 10
-
-  # Setup a pepper to generate the encrypted password.
-  # config.pepper = 'ad102f8786d03074ff9af32989cac7ff9f6ec9a08fb5a5177805c537ed2f03f7910e8e473514bef15c6641666507d7f27413b868d93661d55cfa428026911ece'
-
-  # ==> Configuration for :confirmable
-  # A period that the user is allowed to access the website even without
-  # confirming their account. For instance, if set to 2.days, the user will be
-  # able to access the website for two days without confirming their account,
-  # access will be blocked just in the third day. Default is 0.days, meaning
-  # the user cannot access the website without confirming their account.
-  # config.allow_unconfirmed_access_for = 2.days
-
-  # A period that the user is allowed to confirm their account before their
-  # token becomes invalid. For example, if set to 3.days, the user can confirm
-  # their account within 3 days after the mail was sent, but on the fourth day
-  # their account can't be confirmed with the token any more.
-  # Default is nil, meaning there is no restriction on how long a user can take
-  # before confirming their account.
-  # config.confirm_within = 3.days
-
-  # If true, requires any email changes to be confirmed (exactly the same way as
-  # initial account confirmation) to be applied. Requires additional unconfirmed_email
-  # db field (see migrations). Until confirmed, new email is stored in
-  # unconfirmed_email column, and copied to email column on successful confirmation.
   config.reconfirmable = true
-
-  # Defines which key will be used when confirming an account
-  # config.confirmation_keys = [ :email ]
-
-  # ==> Configuration for :rememberable
-  # The time the user will be remembered without asking for credentials again.
-  # config.remember_for = 2.weeks
-
-  # Invalidates all the remember me tokens when the user signs out.
   config.expire_all_remember_me_on_sign_out = true
-
-  # If true, extends the user's remember period when remembered via cookie.
-  # config.extend_remember_period = false
-
-  # Options to be passed to the created cookie. For instance, you can set
-  # secure: true in order to force SSL only cookies.
-  # config.rememberable_options = {}
-
-  # ==> Configuration for :validatable
-  # Range for password length.
   config.password_length = 8..128
-
-  # Email regex used to validate email formats. It simply asserts that
-  # one (and only one) @ exists in the given string. This is mainly
-  # to give user feedback and not to assert the e-mail validity.
-  # config.email_regexp = /\A[^@]+@[^@]+\z/
-
-  # ==> Configuration for :timeoutable
-  # The time you want to timeout the user session without activity. After this
-  # time the user will be asked for credentials again. Default is 30 minutes.
-  # config.timeout_in = 30.minutes
-
-  # If true, expires auth token on session timeout.
-  # config.expire_auth_token_on_timeout = false
-
-  # ==> Configuration for :lockable
-  # Defines which strategy will be used to lock an account.
-  # :failed_attempts = Locks an account after a number of failed attempts to sign in.
-  # :none            = No lock strategy. You should handle locking by yourself.
-  # config.lock_strategy = :failed_attempts
-
-  # Defines which key will be used when locking and unlocking an account
-  # config.unlock_keys = [ :email ]
-
-  # Defines which strategy will be used to unlock an account.
-  # :email = Sends an unlock link to the user email
-  # :time  = Re-enables login after a certain amount of time (see :unlock_in below)
-  # :both  = Enables both strategies
-  # :none  = No unlock strategy. You should handle unlocking by yourself.
-  # config.unlock_strategy = :both
-
-  # Number of authentication tries before locking an account if lock_strategy
-  # is failed attempts.
-  # config.maximum_attempts = 20
-
-  # Time interval to unlock the account if :time is enabled as unlock_strategy.
-  # config.unlock_in = 1.hour
-
-  # Warn on the last attempt before the account is locked.
-  # config.last_attempt_warning = false
-
-  # ==> Configuration for :recoverable
-  #
-  # Defines which key will be used when recovering the password for an account
-  # config.reset_password_keys = [ :email ]
-
-  # Time interval you can reset your password with a reset password key.
-  # Don't put a too small interval or your users won't have the time to
-  # change their passwords.
   config.reset_password_within = 6.hours
-
-  # ==> Configuration for :encryptable
-  # Allow you to use another encryption algorithm besides bcrypt (default). You can use
-  # :sha1, :sha512 or encryptors from others authentication tools as :clearance_sha1,
-  # :authlogic_sha512 (then you should set stretches above to 20 for default behavior)
-  # and :restful_authentication_sha1 (then you should set stretches to 10, and copy
-  # REST_AUTH_SITE_KEY to pepper).
-  #
-  # Require the `devise-encryptable` gem when using anything other than bcrypt
-  # config.encryptor = :sha512
-
-  # ==> Scopes configuration
-  # Turn scoped views on. Before rendering "sessions/new", it will first check for
-  # "users/sessions/new". It's turned off by default because it's slower if you
-  # are using only default views.
-  # config.scoped_views = false
-
-  # Configure the default scope given to Warden. By default it's the first
-  # devise role declared in your routes (usually :user).
-  # config.default_scope = :user
-
-  # Set this configuration to false if you want /users/sign_out to sign out
-  # only the current scope. By default, Devise signs out all scopes.
-  # config.sign_out_all_scopes = true
-
-  # ==> Navigation configuration
-  # Lists the formats that should be treated as navigational. Formats like
-  # :html, should redirect to the sign in page when the user does not have
-  # access, but formats like :xml or :json, should return 401.
-  #
-  # If you have any extra navigational formats, like :iphone or :mobile, you
-  # should add them to the navigational formats lists.
-  #
-  # The "*/*" below is required to match Internet Explorer requests.
-  # config.navigational_formats = ['*/*', :html]
-
-  # The default HTTP method used to sign out a resource. Default is :delete.
   config.sign_out_via = [:delete, :get]
-
-  # ==> OmniAuth
-  # Add a new OmniAuth provider. Check the wiki for more information on setting
-  # up on your models and hooks.
-  # config.omniauth :github, 'APP_ID', 'APP_SECRET', scope: 'user,public_repo'
-
-  # ==> Warden configuration
-  # If you want to use other strategies, that are not supported by Devise, or
-  # change the failure app, you can configure them inside the config.warden block.
-  #
-  # config.warden do |manager|
-  #   manager.intercept_401 = false
-  #   manager.default_strategies(scope: :user).unshift :some_external_strategy
-  # end
-
-  # ==> Mountable engine configurations
-  # When using Devise inside an engine, let's call it `MyEngine`, and this engine
-  # is mountable, there are some extra configurations to be taken into account.
-  # The following options are available, assuming the engine is mounted as:
-  #
-  #     mount MyEngine, at: '/my_engine'
-  #
-  # The router that invoked `devise_for`, in the example above, would be:
-  # config.router_name = :my_engine
-  #
-  # When using omniauth, Devise cannot automatically set Omniauth path,
-  # so you need to do it manually. For the users scope, it would be:
-  # config.omniauth_path_prefix = '/my_engine/users/auth'
 end
diff --git a/package.json b/package.json
index e26b227dd..c4d8d69ba 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "css-loader": "1.0.0",
     "enzyme": "^3.1.0",
     "enzyme-adapter-react-16": "^1.1.0",
-    "farmbot": "6.4.3",
+    "farmbot": "6.5.0-rc1",
     "farmbot-toastr": "^1.0.3",
     "fastclick": "^1.0.6",
     "file-loader": "1.1.11",
diff --git a/spec/lib/celery_script/checker_spec.rb b/spec/lib/celery_script/checker_spec.rb
index ae65e6ffe..5e717ffaa 100644
--- a/spec/lib/celery_script/checker_spec.rb
+++ b/spec/lib/celery_script/checker_spec.rb
@@ -217,4 +217,72 @@ describe CeleryScript::Checker do
     expect(chk.valid?).to be false
     expect(chk.error.message).to include("not a valid package")
   end
+
+  it "handles good variable declarations" do
+    ast = {
+      kind: "sequence",
+      args: {
+        version: 20180209,
+        locals: {
+          kind: "scope_declaration",
+          :args=>{},
+          body: [
+            {
+              kind: "variable_declaration",
+              args: {
+                label: "parent",
+                data_value: { kind: "coordinate", args: { x: 0, y: 0, z: 0 } }
+              }
+            }
+          ]
+        }
+      },
+      body: [
+        {
+          kind: "move_absolute",
+          args: {
+            speed: 100,
+            location: { kind: "identifier", args: { label: "parent" } },
+            offset: { kind: "coordinate", args: { x: 0, y: 0, z: 0} }
+          }
+        }
+      ]
+    }
+    tree = CeleryScript::AstNode.new(ast)
+    chk  = CeleryScript::Checker.new(tree, corpus)
+    expect(chk.valid?).to be true
+  end
+
+  it "handles bad variable declarations" do
+    ast = {
+      kind: "sequence",
+      args: {
+        version: 20180209,
+        locals: {
+          kind: "scope_declaration",
+          :args=>{},
+          body: [
+            {
+              kind: "variable_declaration",
+              args: { label: "parent", data_value: { kind: "nothing", args: { } } }
+            }
+          ]
+        }
+      },
+      body: [
+        {
+          kind: "move_absolute",
+          args: {
+            speed: 100,
+            location: { kind: "identifier", args: { label: "parent" } },
+            offset: { kind: "coordinate", args: { x: 0, y: 0, z: 0} }
+          }
+        }
+      ]
+    }
+    tree = CeleryScript::AstNode.new(ast)
+    chk  = CeleryScript::Checker.new(tree, corpus)
+    expect(chk.valid?).to be false
+    expect(chk.error.message).to include('but got "nothing"')
+  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 8d4660092..1c69eece1 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,7 @@
 DO_INTEGRATION   = !!ENV["RUN_CAPYBARA"]
 ENV["MQTT_HOST"] = "blooper.io"
 ENV["OS_UPDATE_SERVER"] = "http://non_legacy_update_url.com"
+require "deep_cover/builtin_takeover"
 require "simplecov"
 #Ignore anything with the word "spec" in it. No need to test your tests.
 SimpleCov.start do
diff --git a/webpack/sequences/__tests__/is_parameterized_test.ts b/webpack/sequences/__tests__/is_parameterized_test.ts
new file mode 100644
index 000000000..428d3f3c3
--- /dev/null
+++ b/webpack/sequences/__tests__/is_parameterized_test.ts
@@ -0,0 +1,33 @@
+import { fakeSequence } from "../../__test_support__/fake_state/resources";
+import { TaggedSequence } from "farmbot";
+import { isParameterized } from "../is_parameterized";
+
+type Sequence = TaggedSequence["body"];
+type Locals = Sequence["args"]["locals"]["body"];
+
+describe("isParameterized()", () => {
+
+  function sequence(decl: Locals): Sequence {
+    const { body } = fakeSequence();
+    body.args.locals.body = decl;
+    return body;
+  }
+
+  it("returns true when there are parameters", () => {
+    const hasParent = sequence([
+      {
+        kind: "parameter_declaration",
+        args: {
+          label: "parent",
+          data_type: "Point"
+        }
+      }
+    ]);
+    expect(isParameterized(hasParent)).toBeTruthy();
+  });
+
+  it("returns false when there are no parameters", () => {
+    expect(isParameterized(sequence(undefined))).toBeFalsy();
+    expect(isParameterized(sequence([]))).toBeFalsy();
+  });
+});
diff --git a/webpack/sequences/is_parameterized.ts b/webpack/sequences/is_parameterized.ts
new file mode 100644
index 000000000..39e16c982
--- /dev/null
+++ b/webpack/sequences/is_parameterized.ts
@@ -0,0 +1,7 @@
+import { TaggedSequence } from "farmbot";
+
+/** Determine if a sequence has parameters */
+export function isParameterized(s: TaggedSequence["body"]) {
+  const { body } = s.args.locals;
+  return !!(body && body.length);
+}
diff --git a/webpack/sequences/test_button.tsx b/webpack/sequences/test_button.tsx
index f6668f425..361faf81c 100644
--- a/webpack/sequences/test_button.tsx
+++ b/webpack/sequences/test_button.tsx
@@ -2,6 +2,7 @@ import * as React from "react";
 import { t } from "i18next";
 import { SyncStatus } from "farmbot/dist";
 import { TaggedSequence } from "farmbot";
+import { isParameterized } from "./is_parameterized";
 
 export interface TestBtnProps {
   /** Callback fired ONLY if synced. */
@@ -15,7 +16,7 @@ export interface TestBtnProps {
 export function TestButton({ onClick, onFail, syncStatus, sequence }: TestBtnProps) {
   const isSynced = syncStatus === "synced";
   const isSaved = !sequence.specialStatus;
-  const canTest = isSynced && isSaved;
+  const canTest = isSynced && isSaved && !isParameterized(sequence.body);
   const className = canTest ? "orange" : "pseudo-disabled";
 
   const clickHandler = () => (canTest) ?
diff --git a/yarn.lock b/yarn.lock
index 6da8f6263..d38c8bbe4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2417,9 +2417,9 @@ farmbot-toastr@^1.0.0, farmbot-toastr@^1.0.3:
     farmbot-toastr "^1.0.0"
     typescript "^2.3.4"
 
-farmbot@6.4.3:
-  version "6.4.3"
-  resolved "https://registry.yarnpkg.com/farmbot/-/farmbot-6.4.3.tgz#08f6c361e006410aac87dbba28d3c1a291a458b2"
+farmbot@6.5.0-rc1:
+  version "6.5.0-rc1"
+  resolved "https://registry.yarnpkg.com/farmbot/-/farmbot-6.5.0-rc1.tgz#ad8782b278d743c6ae4051845385de05f825c229"
   dependencies:
     mqtt "2.15.0"