diff --git a/plugins/pushes/heroku/config.rb b/plugins/pushes/heroku/config.rb
index fd7b210ce..927c1a7b9 100644
--- a/plugins/pushes/heroku/config.rb
+++ b/plugins/pushes/heroku/config.rb
@@ -22,17 +22,12 @@ module VagrantPlugins
       # @return [String]
       attr_accessor :remote
 
-      # The Git branch to push to (default: "master").
-      # @return [String]
-      attr_accessor :branch
-
       def initialize
         @app = UNSET_VALUE
         @dir = UNSET_VALUE
 
         @git_bin = UNSET_VALUE
         @remote = UNSET_VALUE
-        @branch = UNSET_VALUE
       end
 
       def finalize!
@@ -41,7 +36,6 @@ module VagrantPlugins
 
         @git_bin = "git" if @git_bin == UNSET_VALUE
         @remote = "heroku" if @remote == UNSET_VALUE
-        @branch = "master" if @branch == UNSET_VALUE
       end
 
       def validate(machine)
@@ -65,12 +59,6 @@ module VagrantPlugins
           )
         end
 
-        if missing?(@branch)
-          errors << I18n.t("heroku_push.errors.missing_attribute",
-            attribute: "branch",
-          )
-        end
-
         { "Heroku push" => errors }
       end
 
diff --git a/test/unit/plugins/pushes/heroku/config_test.rb b/test/unit/plugins/pushes/heroku/config_test.rb
index 0a157b17e..e451ad152 100644
--- a/test/unit/plugins/pushes/heroku/config_test.rb
+++ b/test/unit/plugins/pushes/heroku/config_test.rb
@@ -42,13 +42,6 @@ describe VagrantPlugins::HerokuPush::Config do
     end
   end
 
-  describe "#branch" do
-    it "defaults to git" do
-      subject.finalize!
-      expect(subject.branch).to eq("master")
-    end
-  end
-
   describe "#validate" do
     before do
       allow(machine).to receive(:env)
@@ -60,7 +53,6 @@ describe VagrantPlugins::HerokuPush::Config do
       subject.dir = "."
       subject.git_bin = "git"
       subject.remote = "heroku"
-      subject.branch = "master"
     end
 
     let(:result) { subject.validate(machine) }
@@ -94,16 +86,6 @@ describe VagrantPlugins::HerokuPush::Config do
       end
     end
 
-    context "when the branch is missing" do
-      it "returns an error" do
-        subject.branch = ""
-        subject.finalize!
-        expect(errors).to include(I18n.t("heroku_push.errors.missing_attribute",
-          attribute: "branch",
-        ))
-      end
-    end
-
     context "when the dir is missing" do
       it "returns an error" do
         subject.dir = ""