diff --git a/Formula/c/cask.rb b/Formula/c/cask.rb
index 0a9fec9d6cdef..8f3855aed11c6 100644
--- a/Formula/c/cask.rb
+++ b/Formula/c/cask.rb
@@ -27,10 +27,10 @@ def install
   end
 
   test do
-    (testpath/"Cask").write <<~EOS
+    (testpath/"Cask").write <<~LISP
       (source gnu)
       (depends-on "chess")
-    EOS
+    LISP
     system bin/"cask", "install"
     (testpath/".cask").directory?
   end
diff --git a/Formula/d/doxymacs.rb b/Formula/d/doxymacs.rb
index 2825c922b2abb..28199cc3d1681 100644
--- a/Formula/d/doxymacs.rb
+++ b/Formula/d/doxymacs.rb
@@ -50,11 +50,11 @@ def install
   end
 
   test do
-    (testpath/"test.el").write <<~EOS
+    (testpath/"test.el").write <<~LISP
       (add-to-list 'load-path "#{elisp}")
       (load "doxymacs")
       (print doxymacs-version)
-    EOS
+    LISP
 
     output = shell_output("emacs -Q --batch -l #{testpath}/test.el").strip
     assert_equal "\"#{version}\"", output
diff --git a/Formula/e/ecl.rb b/Formula/e/ecl.rb
index 87e46a8b18c85..6c8479e1d2c62 100644
--- a/Formula/e/ecl.rb
+++ b/Formula/e/ecl.rb
@@ -47,9 +47,9 @@ def install
   end
 
   test do
-    (testpath/"simple.cl").write <<~EOS
+    (testpath/"simple.cl").write <<~LISP
       (write-line (write-to-string (+ 2 2)))
-    EOS
+    LISP
     assert_equal "4", shell_output("#{bin}/ecl -shell #{testpath}/simple.cl").chomp
   end
 end
diff --git a/Formula/o/ol.rb b/Formula/o/ol.rb
index 8503d90838abb..184b43aa9daaf 100644
--- a/Formula/o/ol.rb
+++ b/Formula/o/ol.rb
@@ -28,9 +28,9 @@ def install
   end
 
   test do
-    (testpath/"gcd.ol").write <<~EOS
+    (testpath/"gcd.ol").write <<~LISP
       (print (gcd 1071 1029))
-    EOS
+    LISP
     assert_equal "21", shell_output("#{bin}/ol gcd.ol").strip
   end
 end
diff --git a/Formula/s/sbcl.rb b/Formula/s/sbcl.rb
index 67fe65ed39a28..0bbcdea38f9d2 100644
--- a/Formula/s/sbcl.rb
+++ b/Formula/s/sbcl.rb
@@ -52,17 +52,17 @@ def install
                              SBCL_SOURCE_ROOT: pkgshare/"src",
                              SBCL_HOME:        lib/"sbcl"
     pkgshare.install %w[contrib src]
-    (lib/"sbcl/sbclrc").write <<~EOS
+    (lib/"sbcl/sbclrc").write <<~'LISP'
       (setf (logical-pathname-translations "SYS")
         '(("SYS:SRC;**;*.*.*" #p"#{pkgshare}/src/**/*.*")
           ("SYS:CONTRIB;**;*.*.*" #p"#{pkgshare}/contrib/**/*.*")))
-    EOS
+    LISP
   end
 
   test do
-    (testpath/"simple.sbcl").write <<~EOS
+    (testpath/"simple.sbcl").write <<~LISP
       (write-line (write-to-string (+ 2 2)))
-    EOS
+    LISP
     output = shell_output("#{bin}/sbcl --script #{testpath}/simple.sbcl")
     assert_equal "4", output.strip
   end