diff --git a/contrib/testfiles/chemformula001.lvt b/contrib/testfiles/chemformula001.lvt
index f113ba8934..f2f8aa0580 100644
--- a/contrib/testfiles/chemformula001.lvt
+++ b/contrib/testfiles/chemformula001.lvt
@@ -1,5 +1,5 @@
 %
-% Copyright (C) 2015,2016 The LaTeX3 Project
+% Copyright (C) 2015-2017 The LaTeX3 Project
 %
 
 \documentclass{article}
@@ -7,6 +7,10 @@
 \AUTHOR{Joseph Wright}
 
 % Avoid needing KOMA-Script
+\usepackage[enable-debug]{expl3}
+\ExplSyntaxOn
+\debug_on:n { deprecation }
+\ExplSyntaxOff
 \usepackage{xparse}
 \DeclareDocumentCommand\AfterPackage{smm}{}
 \expandafter\def\csname ver@scrlfile.sty\endcsname{}
diff --git a/contrib/testfiles/ctex001.lvt b/contrib/testfiles/ctex001.lvt
index efddc99e31..a8d1daf9d3 100644
--- a/contrib/testfiles/ctex001.lvt
+++ b/contrib/testfiles/ctex001.lvt
@@ -23,7 +23,10 @@
 \input{regression-test}
 \AUTHOR{Qing Lee}
 
-\usepackage{expl3}
+% \usepackage[enable-debug]{expl3}
+% \ExplSyntaxOn
+% \debug_on:n { deprecation }
+% \ExplSyntaxOff
 \usepackage{xparse}
 \usepackage{xtemplate}
 
diff --git a/contrib/testfiles/ctex002.lvt b/contrib/testfiles/ctex002.lvt
index c4be38ccb0..b4f6ff7928 100644
--- a/contrib/testfiles/ctex002.lvt
+++ b/contrib/testfiles/ctex002.lvt
@@ -23,7 +23,10 @@
 \input{regression-test}
 \AUTHOR{Qing Lee}
 
-\usepackage{expl3}
+% \usepackage[enable-debug]{expl3}
+% \ExplSyntaxOn
+% \debug_on:n { deprecation }
+% \ExplSyntaxOff
 \usepackage{xparse}
 \usepackage{xtemplate}
 
diff --git a/contrib/testfiles/fontspec001.lvt b/contrib/testfiles/fontspec001.lvt
index caad591d4e..e9a1697604 100644
--- a/contrib/testfiles/fontspec001.lvt
+++ b/contrib/testfiles/fontspec001.lvt
@@ -1,12 +1,15 @@
 %
-% Copyright (C) 2015,2016 The LaTeX3 Project
+% Copyright (C) 2015-2017 The LaTeX3 Project
 %
 
 \documentclass{article}
 \input{regression-test}
 \AUTHOR{Joseph Wright}
 
-\usepackage{expl3}
+\usepackage[enable-debug]{expl3}
+\ExplSyntaxOn
+\debug_on:n { deprecation }
+\ExplSyntaxOff
 
 \START
 
diff --git a/contrib/testfiles/mhchem001.lvt b/contrib/testfiles/mhchem001.lvt
index 63c5b40161..9eff8b767d 100644
--- a/contrib/testfiles/mhchem001.lvt
+++ b/contrib/testfiles/mhchem001.lvt
@@ -1,11 +1,15 @@
 %
-% Copyright (C) 2015,2016 The LaTeX3 Project
+% Copyright (C) 2015-2017 The LaTeX3 Project
 %
 
 \documentclass{article}
 \input{regression-test}
 \AUTHOR{Joseph Wright}
 
+\usepackage[enable-debug]{expl3}
+\ExplSyntaxOn
+\debug_on:n { deprecation }
+\ExplSyntaxOff
 \usepackage{mhchem}
 
 \begin{document}
diff --git a/contrib/testfiles/siunitx001.lvt b/contrib/testfiles/siunitx001.lvt
index 0c8f5ccc29..b1b7a5d616 100644
--- a/contrib/testfiles/siunitx001.lvt
+++ b/contrib/testfiles/siunitx001.lvt
@@ -1,11 +1,15 @@
 %
-% Copyright (C) 2015,2016 The LaTeX3 Project
+% Copyright (C) 2015-2017 The LaTeX3 Project
 %
 
 \documentclass{article}
 \input{regression-test}
 \AUTHOR{Joseph Wright}
 
+\usepackage[enable-debug]{expl3}
+\ExplSyntaxOn
+\debug_on:n { deprecation }
+\ExplSyntaxOff
 \usepackage{siunitx}
 
 \begin{document}
diff --git a/contrib/testfiles/unicode-math001.lvt b/contrib/testfiles/unicode-math001.lvt
index b0379f318a..f43d47ddd9 100644
--- a/contrib/testfiles/unicode-math001.lvt
+++ b/contrib/testfiles/unicode-math001.lvt
@@ -1,5 +1,5 @@
 %
-% Copyright (C) 2015,2016 The LaTeX3 Project
+% Copyright (C) 2015-2017 The LaTeX3 Project
 %
 
 \documentclass{article}
@@ -7,6 +7,10 @@
 \AUTHOR{Joseph Wright}
 
 \usepackage{expl3}
+% \usepackage[enable-debug]{expl3}
+% \ExplSyntaxOn
+% \debug_on:n { deprecation }
+% \ExplSyntaxOff
 
 \START