diff --git a/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb b/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
index 5f9bb403aa..605c99b1e5 100644
--- a/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/stanza_grouping_spec.rb
@@ -355,8 +355,8 @@ describe RuboCop::Cop::Cask::StanzaGrouping do
 
     context "when caveats is a heredoc" do
       let(:caveats) do
-        <<-CAVEATS.undent
-          caveats <<-EOS.undent
+        <<~CAVEATS
+          caveats <<~EOS
               This is a multiline caveat.
 
               Let's hope it doesn't cause any problems!
@@ -369,7 +369,7 @@ describe RuboCop::Cop::Cask::StanzaGrouping do
 
     context "when caveats is a block" do
       let(:caveats) do
-        <<-CAVEATS.undent
+        <<~CAVEATS
           caveats do
               puts 'This is a multiline caveat.'
 
diff --git a/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb b/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
index 621ed194c9..9d515c275d 100644
--- a/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
+++ b/Library/Homebrew/test/rubocops/cask/stanza_order_spec.rb
@@ -399,8 +399,8 @@ describe RuboCop::Cop::Cask::StanzaOrder do
 
     context "when caveats is a heredoc" do
       let(:caveats) do
-        <<-CAVEATS.undent
-          caveats <<-EOS.undent
+        <<~CAVEATS
+          caveats <<~EOS
               This is a multiline caveat.
 
               Let's hope it doesn't cause any problems!
@@ -413,7 +413,7 @@ describe RuboCop::Cop::Cask::StanzaOrder do
 
     context "when caveats is a block" do
       let(:caveats) do
-        <<-CAVEATS.undent
+        <<~CAVEATS
           caveats do
               puts 'This is a multiline caveat.'