diff --git a/.rubocop.yml b/.rubocop.yml
index a183aa5b7..47498329c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -631,6 +631,9 @@ RSpec/SpecFilePathFormat:
 RSpec/SpecFilePathSuffix:
   Enabled: true
 
+RSpec/StringAsInstanceDoubleConstant:
+  Enabled: true
+
 RSpec/UndescriptiveLiteralsDescription:
   Enabled: true
 
diff --git a/spec/helpers/comments_helper_spec.rb b/spec/helpers/comments_helper_spec.rb
index f1d85a2b4..f0d8989d5 100644
--- a/spec/helpers/comments_helper_spec.rb
+++ b/spec/helpers/comments_helper_spec.rb
@@ -13,8 +13,8 @@ require "rails_helper"
 RSpec.describe CommentsHelper do
   describe "#user_level_class" do
     def comment_double(as_administrator: false, as_moderator: false, official: false)
-      user = instance_double("User", official?: official, official_level: "Y")
-      instance_double("Comment", as_administrator?: as_administrator, as_moderator?: as_moderator, user: user)
+      user = instance_double(User, official?: official, official_level: "Y")
+      instance_double(Comment, as_administrator?: as_administrator, as_moderator?: as_moderator, user: user)
     end
 
     it "returns is-admin for comment done as administrator" do
@@ -45,14 +45,14 @@ RSpec.describe CommentsHelper do
   describe "#comment_author_class" do
     it "returns is-author if author is the commenting user" do
       author_id = 42
-      comment = instance_double("Comment", user_id: author_id)
+      comment = instance_double(Comment, user_id: author_id)
 
       expect(helper.comment_author_class(comment, author_id)).to eq("is-author")
     end
 
     it "returns an empty string if commenter is not the author" do
       author_id = 42
-      comment = instance_double("Comment", user_id: author_id - 1)
+      comment = instance_double(Comment, user_id: author_id - 1)
 
       expect(helper.comment_author_class(comment, author_id)).to eq("")
     end
diff --git a/spec/models/verification/management/document_spec.rb b/spec/models/verification/management/document_spec.rb
index f814e088c..e9eb02552 100644
--- a/spec/models/verification/management/document_spec.rb
+++ b/spec/models/verification/management/document_spec.rb
@@ -84,19 +84,19 @@ describe Verification::Management::Document do
 
       describe "#valid_age?" do
         it "returns false when the user is younger than the user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: under_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.valid_age?(census_response)).to be false
         end
 
         it "returns true when the user has the user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: just_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.valid_age?(census_response)).to be true
         end
 
         it "returns true when the user is older than the user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: over_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.valid_age?(census_response)).to be true
         end
@@ -104,19 +104,19 @@ describe Verification::Management::Document do
 
       describe "#under_age?" do
         it "returns true when the user is younger than the user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: under_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.under_age?(census_response)).to be true
         end
 
         it "returns false when the user is user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: just_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.under_age?(census_response)).to be false
         end
 
         it "returns false when the user is older than user's minimum required age" do
-          census_response = instance_double("CensusApi::Response",
+          census_response = instance_double(CensusApi::Response,
                                             date_of_birth: over_minium_age_date_of_birth)
           expect(Verification::Management::Document.new.under_age?(census_response)).to be false
         end