diff --git a/testing/lisp/test-ob-C.el b/testing/lisp/test-ob-C.el
index c70534a51..5399aed12 100644
--- a/testing/lisp/test-ob-C.el
+++ b/testing/lisp/test-ob-C.el
@@ -20,7 +20,7 @@
 
 ;;; Code:
 (unless (featurep 'ob-C)
-  (signal 'missing-test-dependency "Support for C code blocks"))
+  (signal 'missing-test-dependency '("Support for C code blocks")))
 
 (ert-deftest ob-C/simple-program ()
   "Hello world program."
diff --git a/testing/lisp/test-ob-R.el b/testing/lisp/test-ob-R.el
index 9ffbf3afd..0d291bf54 100644
--- a/testing/lisp/test-ob-R.el
+++ b/testing/lisp/test-ob-R.el
@@ -22,7 +22,7 @@
 (org-test-for-executable "R")
 (require 'ob-core)
 (unless (featurep 'ess)
-  (signal 'missing-test-dependency "ESS"))
+  (signal 'missing-test-dependency '("ESS")))
 (defvar ess-ask-for-ess-directory)
 (defvar ess-history-file)
 (defvar ess-r-post-run-hook)
@@ -32,7 +32,7 @@
 (declare-function ess-calculate-width "ext:ess-inf" (opt))
 
 (unless (featurep 'ob-R)
-  (signal 'missing-test-dependency "Support for R code blocks"))
+  (signal 'missing-test-dependency '("Support for R code blocks")))
 
 (ert-deftest test-ob-R/simple-session ()
   (let (ess-ask-for-ess-directory ess-history-file)
diff --git a/testing/lisp/test-ob-awk.el b/testing/lisp/test-ob-awk.el
index 874d2c026..b3a2a50fc 100644
--- a/testing/lisp/test-ob-awk.el
+++ b/testing/lisp/test-ob-awk.el
@@ -21,7 +21,7 @@
 ;;; Code:
 (org-test-for-executable "awk")
 (unless (featurep 'ob-awk)
-  (signal 'missing-test-dependency "Support for Awk code blocks"))
+  (signal 'missing-test-dependency '("Support for Awk code blocks")))
 
 (ert-deftest ob-awk/input-none ()
   "Test with no input file"
diff --git a/testing/lisp/test-ob-calc.el b/testing/lisp/test-ob-calc.el
index 12f97279f..f6e8a5a2f 100644
--- a/testing/lisp/test-ob-calc.el
+++ b/testing/lisp/test-ob-calc.el
@@ -21,7 +21,7 @@
 (require 'ob-calc)
 
 (unless (featurep 'ob-calc)
-  (signal 'missing-test-dependency "Support for Calc code blocks"))
+  (signal 'missing-test-dependency '("Support for Calc code blocks")))
 
 (ert-deftest ob-calc/simple-program-mult ()
   "Test of simple multiplication."
diff --git a/testing/lisp/test-ob-clojure.el b/testing/lisp/test-ob-clojure.el
index 33052c98c..4836917b3 100644
--- a/testing/lisp/test-ob-clojure.el
+++ b/testing/lisp/test-ob-clojure.el
@@ -25,7 +25,7 @@
 ;;; Code:
 
 (unless (featurep 'ob-clojure)
-  (signal 'missing-test-dependency "Support for Clojure code blocks"))
+  (signal 'missing-test-dependency '("Support for Clojure code blocks")))
 
 ;; FIXME: The old tests where totally off.  We need to write new tests.
 
diff --git a/testing/lisp/test-ob-eshell.el b/testing/lisp/test-ob-eshell.el
index 0d704b16a..5d0da8d99 100644
--- a/testing/lisp/test-ob-eshell.el
+++ b/testing/lisp/test-ob-eshell.el
@@ -24,7 +24,7 @@
 
 ;;; Code:
 (unless (featurep 'ob-eshell)
-  (signal 'missing-test-dependency "Support for Eshell code blocks"))
+  (signal 'missing-test-dependency '("Support for Eshell code blocks")))
 
 (ert-deftest ob-eshell/execute ()
   "Test ob-eshell execute."
diff --git a/testing/lisp/test-ob-fortran.el b/testing/lisp/test-ob-fortran.el
index 4947d142b..209a966b1 100644
--- a/testing/lisp/test-ob-fortran.el
+++ b/testing/lisp/test-ob-fortran.el
@@ -21,7 +21,7 @@
 ;;; Code:
 (org-test-for-executable "gfortran")
 (unless (featurep 'ob-fortran)
-  (signal 'missing-test-dependency "Support for Fortran code blocks"))
+  (signal 'missing-test-dependency '("Support for Fortran code blocks")))
 
 (ert-deftest ob-fortran/simple-program ()
   "Test of hello world program."
diff --git a/testing/lisp/test-ob-haskell-ghci.el b/testing/lisp/test-ob-haskell-ghci.el
index 990addcd4..6eca0a141 100644
--- a/testing/lisp/test-ob-haskell-ghci.el
+++ b/testing/lisp/test-ob-haskell-ghci.el
@@ -32,9 +32,9 @@
 (require 'org-test "../testing/org-test")
 (org-test-for-executable "ghci")
 (unless (featurep 'haskell-mode)
-  (signal 'missing-test-dependency "haskell-mode"))
+  (signal 'missing-test-dependency '("haskell-mode")))
 (unless (featurep 'haskell)
-  (signal 'missing-test-dependency "haskell"))
+  (signal 'missing-test-dependency '("haskell")))
 
 
 ;;; Helpers
diff --git a/testing/lisp/test-ob-java.el b/testing/lisp/test-ob-java.el
index e0c19fe03..5f00917e5 100644
--- a/testing/lisp/test-ob-java.el
+++ b/testing/lisp/test-ob-java.el
@@ -27,7 +27,7 @@
 ;; ob-java is needed for linter tests as well.  org-lint relies on
 ;; default header arg value.
 (unless (featurep 'ob-java)
-  (signal 'missing-test-dependency "Support for java code blocks"))
+  (signal 'missing-test-dependency '("Support for java code blocks")))
 
 ;;; No Java required
 
diff --git a/testing/lisp/test-ob-julia.el b/testing/lisp/test-ob-julia.el
index 447297262..c0d21fbd8 100644
--- a/testing/lisp/test-ob-julia.el
+++ b/testing/lisp/test-ob-julia.el
@@ -23,9 +23,9 @@
 (org-test-for-executable "julia")
 (require 'ob-core)
 (unless (featurep 'ob-julia)
-  (signal 'missing-test-dependency "Support for julia code blocks"))
+  (signal 'missing-test-dependency '("Support for julia code blocks")))
 (unless (featurep 'ess)
-  (signal 'missing-test-dependency "ESS"))
+  (signal 'missing-test-dependency '("ESS")))
 
 (ert-deftest test-ob-julia/colnames-yes-header-argument ()
   (should
diff --git a/testing/lisp/test-ob-lua.el b/testing/lisp/test-ob-lua.el
index 48648d1c7..2e19c4a3d 100644
--- a/testing/lisp/test-ob-lua.el
+++ b/testing/lisp/test-ob-lua.el
@@ -20,7 +20,7 @@
 
 ;;; Code:
 (unless (featurep 'ob-lua)
-  (signal 'missing-test-dependency "Support for Lua code blocks"))
+  (signal 'missing-test-dependency '("Support for Lua code blocks")))
 
 (ert-deftest test-ob-lua/simple-value ()
   "Test associative array return by value."
diff --git a/testing/lisp/test-ob-maxima.el b/testing/lisp/test-ob-maxima.el
index 653ed4041..4320c4613 100644
--- a/testing/lisp/test-ob-maxima.el
+++ b/testing/lisp/test-ob-maxima.el
@@ -20,7 +20,7 @@
 
 (org-test-for-executable "maxima")
 (unless (featurep 'ob-maxima)
-  (signal 'missing-test-dependency "Support for Maxima code blocks"))
+  (signal 'missing-test-dependency '("Support for Maxima code blocks")))
 
 (ert-deftest ob-maxima/integer-input ()
   "Test of integer input"
diff --git a/testing/lisp/test-ob-octave.el b/testing/lisp/test-ob-octave.el
index dfcfc0190..3c58fad74 100644
--- a/testing/lisp/test-ob-octave.el
+++ b/testing/lisp/test-ob-octave.el
@@ -20,7 +20,7 @@
 
 (org-test-for-executable "octave")
 (unless (featurep 'ob-octave)
-  (signal 'missing-test-dependency "Support for Octave code blocks"))
+  (signal 'missing-test-dependency '("Support for Octave code blocks")))
 
 (ert-deftest ob-octave/input-none ()
   "Number output"
diff --git a/testing/lisp/test-ob-perl.el b/testing/lisp/test-ob-perl.el
index 5826e8cca..e079d09d9 100644
--- a/testing/lisp/test-ob-perl.el
+++ b/testing/lisp/test-ob-perl.el
@@ -21,7 +21,7 @@
 ;;; Code:
 (org-test-for-executable "perl")
 (unless (featurep 'ob-perl)
-  (signal 'missing-test-dependency "Support for perl code blocks"))
+  (signal 'missing-test-dependency '("Support for perl code blocks")))
 
 (ert-deftest test-ob-perl/simple-output ()
   (org-test-with-temp-text "
diff --git a/testing/lisp/test-ob-python.el b/testing/lisp/test-ob-python.el
index e3c6a4009..9ee76f2a8 100644
--- a/testing/lisp/test-ob-python.el
+++ b/testing/lisp/test-ob-python.el
@@ -22,7 +22,7 @@
 (org-test-for-executable "python")
 (require 'ob-core)
 (unless (featurep 'ob-python)
-  (signal 'missing-test-dependency "Support for Python code blocks"))
+  (signal 'missing-test-dependency '("Support for Python code blocks")))
 
 (ert-deftest test-ob-python/colnames-yes-header-argument ()
   (should
diff --git a/testing/lisp/test-ob-ruby.el b/testing/lisp/test-ob-ruby.el
index 2e4cd020b..27f96f6da 100644
--- a/testing/lisp/test-ob-ruby.el
+++ b/testing/lisp/test-ob-ruby.el
@@ -19,9 +19,9 @@
 ;;; Code:
 (org-test-for-executable "ruby")
 (unless (featurep 'ob-ruby)
-  (signal 'missing-test-dependency "Support for Ruby code blocks"))
+  (signal 'missing-test-dependency '("Support for Ruby code blocks")))
 (unless (featurep 'inf-ruby)
-  (signal 'missing-test-dependency "inf-ruby"))
+  (signal 'missing-test-dependency '("inf-ruby")))
 
 (ert-deftest test-ob-ruby/session-output-1 ()
     (should (equal (org-test-with-temp-text "#+begin_src ruby :session org-test-ruby :results output
diff --git a/testing/lisp/test-ob-scheme.el b/testing/lisp/test-ob-scheme.el
index 3e9a4707c..79ce2b453 100644
--- a/testing/lisp/test-ob-scheme.el
+++ b/testing/lisp/test-ob-scheme.el
@@ -24,11 +24,11 @@
 ;;; Code:
 
 (unless (featurep 'ob-scheme)
-  (signal 'missing-test-dependency "Support for Scheme code blocks"))
+  (signal 'missing-test-dependency '("Support for Scheme code blocks")))
 (unless (featurep 'geiser)
-  (signal 'missing-test-dependency "geiser"))
+  (signal 'missing-test-dependency '("geiser")))
 (unless (version<= "27.1" emacs-version)
-  (signal 'missing-test-dependency "Geiser required for Scheme code blocks needs Emacs >=27.1"))
+  (signal 'missing-test-dependency '("Geiser required for Scheme code blocks needs Emacs >=27.1")))
 
 (ert-deftest test-ob-scheme/tables ()
   "Test table output."
diff --git a/testing/lisp/test-ob-sed.el b/testing/lisp/test-ob-sed.el
index a91aa54cc..c57c79899 100644
--- a/testing/lisp/test-ob-sed.el
+++ b/testing/lisp/test-ob-sed.el
@@ -23,7 +23,7 @@
 (require 'ob-sed)
 (org-test-for-executable "sed")
 (unless (featurep 'ob-sed)
-  (signal 'missing-test-dependency "Support for Sed code blocks"))
+  (signal 'missing-test-dependency '("Support for Sed code blocks")))
 
 (ert-deftest ob-sed-test/simple-execution-of-script ()
   "Test simple execution of script."
diff --git a/testing/lisp/test-ob-shell.el b/testing/lisp/test-ob-shell.el
index b760031b4..9addd045b 100644
--- a/testing/lisp/test-ob-shell.el
+++ b/testing/lisp/test-ob-shell.el
@@ -30,7 +30,7 @@
 (require 'org-macs)
 
 (unless (featurep 'ob-shell)
-  (signal 'missing-test-dependency "Support for Shell code blocks"))
+  (signal 'missing-test-dependency '("Support for Shell code blocks")))
 
 (org-test-for-executable "sh")
 
diff --git a/testing/lisp/test-ob-sql.el b/testing/lisp/test-ob-sql.el
index 919741571..ac8a1ccb2 100644
--- a/testing/lisp/test-ob-sql.el
+++ b/testing/lisp/test-ob-sql.el
@@ -21,7 +21,7 @@
 ;;; Code:
 
 (unless (featurep 'ob-sql)
-  (signal 'missing-test-dependency "Support for sql code blocks"))
+  (signal 'missing-test-dependency '("Support for sql code blocks")))
 
 (defmacro ob-sql/command (&rest body)
   "Execute body and return the command that would have been executed."
diff --git a/testing/lisp/test-ob-sqlite.el b/testing/lisp/test-ob-sqlite.el
index 621a11b0b..0d04643cf 100644
--- a/testing/lisp/test-ob-sqlite.el
+++ b/testing/lisp/test-ob-sqlite.el
@@ -21,7 +21,7 @@
 ;;; Code:
 (org-test-for-executable "sqlite3")
 (unless (featurep 'ob-sqlite)
-  (signal 'missing-test-dependency "Support for sqlite code blocks"))
+  (signal 'missing-test-dependency '("Support for sqlite code blocks")))
 
 (ert-deftest ob-sqlite/table-variables-with-commas ()
   "Test of a table variable that contains commas. This guarantees that this code path results in a valid CSV."
diff --git a/testing/lisp/test-org-ctags.el b/testing/lisp/test-org-ctags.el
index b8e3e4d22..4e0ee37ff 100644
--- a/testing/lisp/test-org-ctags.el
+++ b/testing/lisp/test-org-ctags.el
@@ -23,7 +23,7 @@
 ;; Alternative implementation for `test-org-ctags/mock-command'
 ;; is required for cmd.exe.
 (unless (string-equal "-c" shell-command-switch)
-  (signal 'missing-test-dependency "POSIX shell"))
+  (signal 'missing-test-dependency '("POSIX shell")))
 
 (require 'org-ctags)
 
diff --git a/testing/lisp/test-org-tempo.el b/testing/lisp/test-org-tempo.el
index 0760d4532..7382b6dc4 100644
--- a/testing/lisp/test-org-tempo.el
+++ b/testing/lisp/test-org-tempo.el
@@ -24,7 +24,7 @@
 (require 'org-tempo)
 
 (unless (featurep 'org-tempo)
-  (signal 'missing-test-dependency "org-tempo"))
+  (signal 'missing-test-dependency '("org-tempo")))
 
 (ert-deftest test-org-tempo/completion ()
   "Test that blocks and keywords are expanded correctly by org-tempo."
diff --git a/testing/lisp/test-ox-ascii.el b/testing/lisp/test-ox-ascii.el
index 2df1bd795..0532b89ee 100644
--- a/testing/lisp/test-ox-ascii.el
+++ b/testing/lisp/test-ox-ascii.el
@@ -25,7 +25,7 @@
 
 (require 'ox-ascii nil t)
 (unless (featurep 'ox-ascii)
-  (signal 'missing-test-dependency "org-export-ascii"))
+  (signal 'missing-test-dependency '("org-export-ascii")))
 
 
 
diff --git a/testing/lisp/test-ox-beamer.el b/testing/lisp/test-ox-beamer.el
index be83b12e0..f5743409f 100644
--- a/testing/lisp/test-ox-beamer.el
+++ b/testing/lisp/test-ox-beamer.el
@@ -25,7 +25,7 @@
 
 (require 'ox-beamer nil t)
 (unless (featurep 'ox-beamer)
-  (signal 'missing-test-dependency "org-export-beamer"))
+  (signal 'missing-test-dependency '("org-export-beamer")))
 
 
 
diff --git a/testing/lisp/test-ox-latex.el b/testing/lisp/test-ox-latex.el
index d0be4e5a4..892ac4437 100644
--- a/testing/lisp/test-ox-latex.el
+++ b/testing/lisp/test-ox-latex.el
@@ -25,7 +25,7 @@
 
 (require 'ox-latex nil t)
 (unless (featurep 'ox-latex)
-  (signal 'missing-test-dependency "org-export-latex"))
+  (signal 'missing-test-dependency '("org-export-latex")))
 
 
 
diff --git a/testing/lisp/test-ox-texinfo.el b/testing/lisp/test-ox-texinfo.el
index b67d2f4c1..b16a344e7 100644
--- a/testing/lisp/test-ox-texinfo.el
+++ b/testing/lisp/test-ox-texinfo.el
@@ -27,7 +27,7 @@
 (eval-when-compile (require 'subr-x))
 
 (unless (featurep 'ox-texinfo)
-  (signal 'missing-test-dependency "org-export-texinfo"))
+  (signal 'missing-test-dependency '("org-export-texinfo")))
 
 
 ;;; TeX fragments