diff --git a/build-aux/build.rs b/build-aux/build.rs
index b5efcb0f8..2f90b107f 100644
--- a/build-aux/build.rs
+++ b/build-aux/build.rs
@@ -1,6 +1,6 @@
 #[cfg(feature = "manpage")]
 use clap_mangen::Man;
-#[cfg(feature = "static")]
+#[cfg(any(feature = "static", feature = "completions"))]
 use std::path::Path;
 use std::{collections, env};
 use vergen::EmitBuilder;
@@ -9,7 +9,7 @@ use {
     clap::CommandFactory,
     clap_complete::generator::generate_to,
     clap_complete::shells::{Bash, Elvish, Fish, PowerShell, Zsh},
-    std::{fs, path::Path},
+    std::fs,
 };
 
 #[cfg(feature = "completions")]
diff --git a/documentation/c05-packages.sil b/documentation/c05-packages.sil
index b3f6089a4..df4c4037c 100644
--- a/documentation/c05-packages.sil
+++ b/documentation/c05-packages.sil
@@ -274,6 +274,10 @@ This section introduces packages that could not fit in another category.
 \status:low
 \package-documentation{ifattop}
 
+\subsection{retrograde}
+\status:high
+\package-documentation{retrograde}
+
 \section{Frames and page layouts}
 
 As we mentioned in the first chapter, SILE uses frames as an indication of where to put text onto
diff --git a/packages/balanced-frames/init.lua b/packages/balanced-frames/init.lua
index 644c1a175..1c3d10492 100644
--- a/packages/balanced-frames/init.lua
+++ b/packages/balanced-frames/init.lua
@@ -72,8 +72,8 @@ local function buildPage (typesetter, independent)
   return true
 end
 
-function package:_init (class)
-  base._init(self, class)
+function package:_init (options)
+  base._init(self, options)
   self.class:registerPostinit(function(_)
     if not unbalanced_buildPage then
       unbalanced_buildPage = SILE.typesetter.buildPage
diff --git a/packages/boustrophedon/init.lua b/packages/boustrophedon/init.lua
index ce81f8fd1..c77dfbfbd 100644
--- a/packages/boustrophedon/init.lua
+++ b/packages/boustrophedon/init.lua
@@ -3,8 +3,8 @@ local base = require("packages.base")
 local package = pl.class(base)
 package._name = "boustrophedon"
 
-function package:_init (class)
-  base._init(self, class)
+function package:_init (options)
+  base._init(self, options)
   SILE.hyphenator.languages.grc = { patterns={} }
   SILE.nodeMakers.grc = pl.class(SILE.nodeMakers.unicode)
   function SILE.nodeMakers.grc.iterator (node, items)
diff --git a/packages/retrograde/init.lua b/packages/retrograde/init.lua
new file mode 100644
index 000000000..33e509ca0
--- /dev/null
+++ b/packages/retrograde/init.lua
@@ -0,0 +1,84 @@
+local base = require("packages.base")
+
+local package = pl.class(base)
+package._name = "retrograde"
+
+local semver = require("semver")
+
+local semver_descending = function (a, b)
+   a, b = semver(a), semver(b)
+   return a > b
+end
+
+-- Default settings that have gone out of fashion
+package.default_settings = {
+   ["0.15.0"] = {
+      ["shaper.spaceenlargementfactor"] = 1.2,
+   },
+}
+
+function package:_init (options)
+  base._init(self, options)
+  self:defaults(options.target)
+end
+
+function package:defaults (target)
+  target = semver(target and target or SILE.version)
+  local target_hit = false
+  for version, settings in pl.tablex.sort(self.default_settings, semver_descending) do
+     version = semver(version)
+     for parameter, value in pairs(settings) do
+        SU.debug("defaults", ("Resetting '%s' to '%s' as it was prior to v%s"):format(parameter, tostring(value), version))
+        SILE.settings:set(parameter, value, true)
+     end
+     if target_hit then break end
+     if version <= target then target_hit = true end
+  end
+end
+
+function package:registerCommands ()
+
+  self:registerCommand("defaults", function (options, content)
+     if content then
+        SILE.settings:temporarily(function ()
+           self:defaults(options.target)
+        end)
+     else
+        self:defaults(options.target)
+     end
+  end)
+
+end
+
+local doctarget = "v" .. tostring(semver(SILE.version))
+package.documentation = ([[
+\begin{document}
+
+From time to time, the default behavior of a function or value of a setting in SILE might change with a new release.
+If these changes are expected to cause document reflows they will be noted in release notes as breaking changes.
+That generally means old documents will have to be updated to keep rending the same way.
+On a best-effort basis (not a guarantee) this package tries to restore earlier default behaviors and settings.
+
+For settings this is relatively simple.
+You just set the old default value explicitly in your document or project.
+But first, knowing what those are requires a careful reading of the release notes.
+Then you have to chase down the incantations to set the old values.
+This package tries to restore as many previous setting values as possible to make old documents render like they would have in previous releases without changing the documents themselves (beyond loading this package).
+
+For functions things are a little more complex, but for as many cases as possible we'll try to allow swapping old versions of code.
+
+None of this is a guarantee that your old document will be stable in new versions of SILE.
+All of this is a danger zone.
+
+From inside a document, use \autodoc:command{\use[module=packages.retrograde,target=%s]} to load features from SILE %s.
+
+This can also be triggered from the command line with no changes to a document:
+
+\begin{autodoc:codeblock}
+$ sile -u 'packages.retrograde[target=%s]'
+\end{autodoc:codeblock}
+
+\end{document}
+]]):format(doctarget, doctarget, doctarget)
+
+return package
diff --git a/shapers/base.lua b/shapers/base.lua
index 330dea190..d0f347449 100644
--- a/shapers/base.lua
+++ b/shapers/base.lua
@@ -5,7 +5,7 @@
 -- end
 
 SILE.settings:declare({ parameter = "shaper.variablespaces", type = "boolean", default = true })
-SILE.settings:declare({ parameter = "shaper.spaceenlargementfactor", type = "number or integer", default = 1.2 })
+SILE.settings:declare({ parameter = "shaper.spaceenlargementfactor", type = "number or integer", default = 1 })
 SILE.settings:declare({ parameter = "shaper.spacestretchfactor", type = "number or integer", default = 1/2 })
 SILE.settings:declare({ parameter = "shaper.spaceshrinkfactor", type = "number or integer", default = 1/3 })
 
diff --git a/tests/alignment.sil b/tests/alignment.sil
index f50f413a7..144257d62 100644
--- a/tests/alignment.sil
+++ b/tests/alignment.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.lorem]
 \font[family=Libertinus Serif]
diff --git a/tests/amharic.sil b/tests/amharic.sil
index b22d154f8..247d2d62e 100644
--- a/tests/amharic.sil
+++ b/tests/amharic.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \font[family=Noto Sans Ethiopic,language=am]
 የሰው፡ልጅ፡ሁሉ፡ሲወለድ፡ነጻና፡በክብርና፡በመብትም፡እኩልነት፡ያለው፡ነው።፡የተፈጥሮ፡ማስተዋልና፡ሕሊና፡ስላለው፡አንዱ፡ሌላውን፡በወንድማማችነት፡መንፈስ፡መመልከት፡ይገባዋል።
 
diff --git a/tests/arabic-scripts.sil b/tests/arabic-scripts.sil
index 10ec342c1..bf939b49d 100644
--- a/tests/arabic-scripts.sil
+++ b/tests/arabic-scripts.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.bidi]
 \font[family=LateefGR,size=16pt,language=en]
diff --git a/tests/bibtex.sil b/tests/bibtex.sil
index d50221a8a..06adcc5c4 100644
--- a/tests/bibtex.sil
+++ b/tests/bibtex.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \use[module=packages.bibtex]
diff --git a/tests/bidi.sil b/tests/bidi.sil
index 1e26ebff0..6f4a8a900 100644
--- a/tests/bidi.sil
+++ b/tests/bidi.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \font[family=SBL Hebrew,language=he]
 \font[size=25pt]
 \set[parameter=document.baselineskip,value=29pt]
diff --git a/tests/bug-1044.sil b/tests/bug-1044.sil
index 26d156816..f9962bf15 100644
--- a/tests/bug-1044.sil
+++ b/tests/bug-1044.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \font[family=Libertinus Serif]{Ta of}
diff --git a/tests/bug-1101.sil b/tests/bug-1101.sil
index ddc7e0a01..d2b2f6102 100644
--- a/tests/bug-1101.sil
+++ b/tests/bug-1101.sil
@@ -1,4 +1,5 @@
 \begin[class=jplain,layout=tate,papersize=a4]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 
diff --git a/tests/bug-117.sil b/tests/bug-117.sil
index ed044f8f1..60250d6f3 100644
--- a/tests/bug-117.sil
+++ b/tests/bug-117.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 %nice script from SILE book
 \begin{script}
 for i=1,10 do
diff --git a/tests/bug-1259.sil b/tests/bug-1259.sil
index 55f47dfa1..6f1a5dc47 100644
--- a/tests/bug-1259.sil
+++ b/tests/bug-1259.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \use[module=packages.rules]
diff --git a/tests/bug-1280.sil b/tests/bug-1280.sil
index e70e280f5..b85dfcda8 100644
--- a/tests/bug-1280.sil
+++ b/tests/bug-1280.sil
@@ -1,4 +1,5 @@
 \begin[papersize=15cm x 6cm]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \font[filename=.fonts/NotoSerifCJK-Regular.ttc]
 \nofolios
 \neverindent
diff --git a/tests/bug-1297-hyph-fr-ca.sil b/tests/bug-1297-hyph-fr-ca.sil
index 77416554c..03fe2fac1 100644
--- a/tests/bug-1297-hyph-fr-ca.sil
+++ b/tests/bug-1297-hyph-fr-ca.sil
@@ -1,4 +1,5 @@
 \begin[papersize=6in x 9in]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \language[main=fr]
 
diff --git a/tests/bug-1317.sil b/tests/bug-1317.sil
index 57413de07..bff19d3f4 100644
--- a/tests/bug-1317.sil
+++ b/tests/bug-1317.sil
@@ -1,4 +1,5 @@
 \begin[direction=RTL,papersize=a7]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \font[family=Amiri,size=30pt]
 \nofolios
 \neverindent
diff --git a/tests/bug-1320.sil b/tests/bug-1320.sil
index 285d12f93..169645c68 100644
--- a/tests/bug-1320.sil
+++ b/tests/bug-1320.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \use[module=packages.rules]
diff --git a/tests/bug-1343-dotfill-stretch.sil b/tests/bug-1343-dotfill-stretch.sil
index 265b76f81..cb4d6d87e 100644
--- a/tests/bug-1343-dotfill-stretch.sil
+++ b/tests/bug-1343-dotfill-stretch.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.leaders]
 \use[module=packages.lorem]
diff --git a/tests/bug-1359.sil b/tests/bug-1359.sil
index fc2205d0e..118a25641 100644
--- a/tests/bug-1359.sil
+++ b/tests/bug-1359.sil
@@ -1,4 +1,5 @@
 \begin[papersize=6in x 9in]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \language[main=fr]
diff --git a/tests/bug-1362.sil b/tests/bug-1362.sil
index 5feb57409..8854f72bd 100644
--- a/tests/bug-1362.sil
+++ b/tests/bug-1362.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \language[main=en]
diff --git a/tests/bug-1430.sil b/tests/bug-1430.sil
index 96788b9f4..3cd767d5c 100644
--- a/tests/bug-1430.sil
+++ b/tests/bug-1430.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \use[module=packages.grid,spacing=50pt]
diff --git a/tests/bug-1495-inline-math-layout.sil b/tests/bug-1495-inline-math-layout.sil
index ca96b1272..56e2975d6 100644
--- a/tests/bug-1495-inline-math-layout.sil
+++ b/tests/bug-1495-inline-math-layout.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \use[module=packages.math]
diff --git a/tests/bug-1580.sil b/tests/bug-1580.sil
index 3c0d6a3b4..753dd51f4 100644
--- a/tests/bug-1580.sil
+++ b/tests/bug-1580.sil
@@ -1,4 +1,5 @@
 \begin[class=plain,papersize=a7]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \use[module=packages.masters]
diff --git a/tests/bug-162.sil b/tests/bug-162.sil
index acad9ffa6..87d6d6db1 100644
--- a/tests/bug-162.sil
+++ b/tests/bug-162.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 Both lines below should end in a period.
 
 \font[language=cs]
diff --git a/tests/bug-1647.sil b/tests/bug-1647.sil
index 82e70794c..09789db28 100644
--- a/tests/bug-1647.sil
+++ b/tests/bug-1647.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \set[parameter=document.parskip, value=50pt]
diff --git a/tests/bug-1674.sil b/tests/bug-1674.sil
index 209af1e54..e8cb0a0d4 100644
--- a/tests/bug-1674.sil
+++ b/tests/bug-1674.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \script{SILE.processString("Foo \\em{bar} \\em{baz}", "sil")}
diff --git a/tests/bug-1708.sil b/tests/bug-1708.sil
index cf6d14b1d..a1c498af0 100644
--- a/tests/bug-1708.sil
+++ b/tests/bug-1708.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \set[parameter=document.letterspaceglue, value=5pt]
@@ -9,4 +10,4 @@ Lorem ipsum\footnote{test}
 
 Lorem ipsum% Should still have letterspacing at 5pt
 
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-192.sil b/tests/bug-192.sil
index f0a46b6a5..be773d121 100644
--- a/tests/bug-192.sil
+++ b/tests/bug-192.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Noto Naskh Arabic,language=urd,size=18pt]
 \hbox\skip[height=95%fh]
diff --git a/tests/bug-200.sil b/tests/bug-200.sil
index ec9682e67..162b89f92 100644
--- a/tests/bug-200.sil
+++ b/tests/bug-200.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus,size=16pt,language=en]
 \begin{raggedright}
diff --git a/tests/bug-226.sil b/tests/bug-226.sil
index 8a4876a90..35212e48c 100644
--- a/tests/bug-226.sil
+++ b/tests/bug-226.sil
@@ -1,4 +1,5 @@
 \begin{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \hfill Filler content here: Par 1 (One)
 
 \hfill Par 2 (Two)
@@ -8,4 +9,4 @@
 \hfill Out,
 
 \hfill Caleb Maclennan
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-241.sil b/tests/bug-241.sil
index 4d0d0a810..4ca7d2ccf 100644
--- a/tests/bug-241.sil
+++ b/tests/bug-241.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus,size=9pt]
 \center{TITILE\break{}Then vfill to logo\vfill{}<logo>\par\break}
diff --git a/tests/bug-243.sil b/tests/bug-243.sil
index bf1377f40..9083807b8 100644
--- a/tests/bug-243.sil
+++ b/tests/bug-243.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.leaders]
 \font[size=50pt]
diff --git a/tests/bug-244.sil b/tests/bug-244.sil
index 044c6462e..63bdb4412 100644
--- a/tests/bug-244.sil
+++ b/tests/bug-244.sil
@@ -1,3 +1,4 @@
 \begin[papersize=a4,class=jplain,layout=tate]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \latin-in-tate{Hello world.}
 \end{document}
diff --git a/tests/bug-252.sil b/tests/bug-252.sil
index 3c1f8e81f..6fed341b7 100644
--- a/tests/bug-252.sil
+++ b/tests/bug-252.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.frametricks]
 \use[module=packages.lorem]
 This is a test\footnote{What happens to frames?}.
diff --git a/tests/bug-252a.sil b/tests/bug-252a.sil
index b9a4c8840..0e8bd4593 100644
--- a/tests/bug-252a.sil
+++ b/tests/bug-252a.sil
@@ -1,7 +1,8 @@
 \begin[papersize=a7,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \use[module=packages.rebox]
 \footnote:separator{\skip[height=5pt]}
 \define[command=deepbox]{\rebox[depth=60pt,height=10pt]{x}}
 This is a test\footnote{\deepbox}.
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-254.sil b/tests/bug-254.sil
index f9956afbf..6aa33e71a 100644
--- a/tests/bug-254.sil
+++ b/tests/bug-254.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \raggedright{
 \font[weight=600]{This} is a sample of bogus\break
 extra space.
@@ -6,4 +7,4 @@ extra space.
 \font[weight=600]{This} does not have\break
 {}extra space.
 }
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-255.sil b/tests/bug-255.sil
index bf9a2d019..3ea12f0d8 100644
--- a/tests/bug-255.sil
+++ b/tests/bug-255.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.frametricks]
 \script{
   SILE.registerCommand("donothing", function (options, content)
diff --git a/tests/bug-255b.sil b/tests/bug-255b.sil
index 6c0293fe1..707bedd3e 100644
--- a/tests/bug-255b.sil
+++ b/tests/bug-255b.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.frametricks]
 \script{
 SILE.registerCommand("donothing", function(o,c)
diff --git a/tests/bug-262.sil b/tests/bug-262.sil
index 091d21bbd..96881e880 100644
--- a/tests/bug-262.sil
+++ b/tests/bug-262.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.lorem]
 \hbox
diff --git a/tests/bug-264.sil b/tests/bug-264.sil
index c29bd8d56..10072fe70 100644
--- a/tests/bug-264.sil
+++ b/tests/bug-264.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 Footnote\skip[height=170pt plus 50pt]
 marker.\footnote{Same page\hfill\break as marker?}
diff --git a/tests/bug-264b.sil b/tests/bug-264b.sil
index ecaef722e..71afaea96 100644
--- a/tests/bug-264b.sil
+++ b/tests/bug-264b.sil
@@ -1,6 +1,7 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 % Note: The failure case for this involves an infinite loop when it
-% erroniously matched penalty types that aren�t actually page breaks
+% erroneously matched penalty types that aren't actually page breaks
 \use[module=packages.linespacing]
 \set[parameter=linespacing.method,value=fit-font]
 \set[parameter=linespacing.fit-font.extra-space,value=15pt plus 0.5pt minus 0.5pt]
diff --git a/tests/bug-266.sil b/tests/bug-266.sil
index 2294ba367..593cf29ad 100644
--- a/tests/bug-266.sil
+++ b/tests/bug-266.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 
 Word\glue[width=1ex]to the wise
diff --git a/tests/bug-269.sil b/tests/bug-269.sil
index 091780cde..ec4a9a2fd 100644
--- a/tests/bug-269.sil
+++ b/tests/bug-269.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus,size=10.1pt,language=tr]
 \use[module=packages.footnotes]
diff --git a/tests/bug-283.sil b/tests/bug-283.sil
index 7f0f3b724..d9a57cb1b 100644
--- a/tests/bug-283.sil
+++ b/tests/bug-283.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Libertinus Serif,size=12.7pt,language=tr]
 \set[parameter=shaper.spacestretchfactor,value=1.2]
diff --git a/tests/bug-284.sil b/tests/bug-284.sil
index e87ced8c7..6c34b098c 100644
--- a/tests/bug-284.sil
+++ b/tests/bug-284.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \set[parameter=document.lskip,value=15pt]
 \set[parameter=document.rskip,value=10pt]
diff --git a/tests/bug-301.sil b/tests/bug-301.sil
index 379286497..98dcb2f80 100644
--- a/tests/bug-301.sil
+++ b/tests/bug-301.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.linespacing]
 \nofolios
 \font[family=Gentium Plus,size=9.5pt]
diff --git a/tests/bug-309.sil b/tests/bug-309.sil
index 6499873e8..7e7b3c38f 100644
--- a/tests/bug-309.sil
+++ b/tests/bug-309.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \set[parameter=document.parskip,value=2em plus 1em]
 Test par
diff --git a/tests/bug-317.sil b/tests/bug-317.sil
index dc0a729c2..ca86f4cb5 100644
--- a/tests/bug-317.sil
+++ b/tests/bug-317.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.verbatim]
 \define[command=verbatim:font]{\set[parameter=font.family,value=Hack]}
diff --git a/tests/bug-337.sil b/tests/bug-337.sil
index 4cdfd922e..5234876c9 100644
--- a/tests/bug-337.sil
+++ b/tests/bug-337.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=book,sheetsize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.color]
 \script[src=inc.bug-337]
 \define[command=cropmarks:header]{tests/bug-337.sil}
diff --git a/tests/bug-344.sil b/tests/bug-344.sil
index 22a5388ae..43485b9fe 100644
--- a/tests/bug-344.sil
+++ b/tests/bug-344.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \define[command=mwe]{One, two. Buckle my shoe.\smallskip}
 
diff --git a/tests/bug-353.sil b/tests/bug-353.sil
index b564c40ca..448668c47 100644
--- a/tests/bug-353.sil
+++ b/tests/bug-353.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.background]
 \use[module=packages.color]
 \nofolios
diff --git a/tests/bug-355-tr-hyphenation.sil b/tests/bug-355-tr-hyphenation.sil
index b0304a4f3..06ff668a3 100644
--- a/tests/bug-355-tr-hyphenation.sil
+++ b/tests/bug-355-tr-hyphenation.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \set[parameter=shaper.variablespaces, value=false]
diff --git a/tests/bug-39.sil b/tests/bug-39.sil
index 87f1c6697..9d6127c4b 100644
--- a/tests/bug-39.sil
+++ b/tests/bug-39.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.frametricks]
 \right-running-head{First Line of Header\skip[height=8mm] Second Line of Header}
 \showframe[id=all]
diff --git a/tests/bug-465-a.sil b/tests/bug-465-a.sil
index 34651f9c2..a57bb8fda 100644
--- a/tests/bug-465-a.sil
+++ b/tests/bug-465-a.sil
@@ -1,3 +1,4 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 Hello \include[src=bug-465-b.sil].
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-526.sil b/tests/bug-526.sil
index 63395abe4..52edb662e 100644
--- a/tests/bug-526.sil
+++ b/tests/bug-526.sil
@@ -1,4 +1,5 @@
 \begin[class=plain,papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.frametricks]
 \use[module=packages.lorem]
diff --git a/tests/bug-530.sil b/tests/bug-530.sil
index 40ab0f816..d9fff3048 100644
--- a/tests/bug-530.sil
+++ b/tests/bug-530.sil
@@ -1,4 +1,5 @@
 \begin[direction=RTL]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 
 \lorem
@@ -7,4 +8,4 @@
 
 \lorem
 
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/bug-54.sil b/tests/bug-54.sil
index 5807b4dc5..160a951cb 100644
--- a/tests/bug-54.sil
+++ b/tests/bug-54.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus,size=12pt]
 \set[parameter=document.parindent,value=10mm]
diff --git a/tests/bug-583.sil b/tests/bug-583.sil
index e843838d5..f8e33b50c 100644
--- a/tests/bug-583.sil
+++ b/tests/bug-583.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \define[command=ah]{\discretionary[prebreak=-, replacement=’]}
diff --git a/tests/bug-61.sil b/tests/bug-61.sil
index 8a4efd80a..95218e40d 100644
--- a/tests/bug-61.sil
+++ b/tests/bug-61.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.frametricks]
 \begin[first-content-frame=frame1]{pagetemplate}
 \frame[id=frame1,left=left(content),right=right(content),height=18pt,top=top(content),next=frame2]
diff --git a/tests/bug-62.sil b/tests/bug-62.sil
index 6d87df13d..f1b91a0f4 100644
--- a/tests/bug-62.sil
+++ b/tests/bug-62.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 First paragraph %comment
 
 
diff --git a/tests/bug-621.sil b/tests/bug-621.sil
index 9fd878b1d..ba5b5056f 100644
--- a/tests/bug-621.sil
+++ b/tests/bug-621.sil
@@ -1,4 +1,5 @@
 \begin{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \font[language=fr, size=15pt]
 La peine de mort est nécessaire, disent les partisans de l’antique et barbare routine ; sans elle il n’est point de frein assez puissant pour le crime. Qui vous l’a dit ? Avez-vous calculé tous les ressorts par lesquels les lois pénales peuvent agir sur la sensibilité humaine ? Hélas ! avant la mort, combien de douleurs physiques et morales l’homme ne peut-il pas endurer !
 
diff --git a/tests/bug-702.sil b/tests/bug-702.sil
index 0c6b9b9c7..a101a6898 100644
--- a/tests/bug-702.sil
+++ b/tests/bug-702.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \language[main=fr]
 Il était une fois, dans un pays très lointain (dont le nom périlleux ne doit pas être prononcé), vivait Bernadette, qui nous disait « Rien d’important! » As-tu entendu?
 \end{document}
diff --git a/tests/bug-704.sil b/tests/bug-704.sil
index 2205eba4f..18e4b9479 100644
--- a/tests/bug-704.sil
+++ b/tests/bug-704.sil
@@ -1,4 +1,5 @@
 \begin[papersize=6in x 9in]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \language[main=fr]
 
@@ -10,7 +11,7 @@ Cinq : « Six ‹ Sept › `Huit » !
 
 Treize ; Quatorze… !
 
-Quinze (?), ?!, [!], …? etc. 
+Quinze (?), ?!, [!], …? etc.
 
 
 Un! Deux? Trois!? Quatre!!!
@@ -21,6 +22,6 @@ Cinq: «Six ‹Sept› `Huit»!
 
 Treize; Quatorze…!
 
-Quinze ( ?), ? !, [  !], … ? etc. 
+Quinze ( ?), ? !, [  !], … ? etc.
 
 \end{document}
diff --git a/tests/bug-76.sil b/tests/bug-76.sil
index dc7bdd0bc..6e06e48da 100644
--- a/tests/bug-76.sil
+++ b/tests/bug-76.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.bidi]
 \thisframeRTL
diff --git a/tests/bug-79.sil b/tests/bug-79.sil
index 3178b8df4..28b72c312 100644
--- a/tests/bug-79.sil
+++ b/tests/bug-79.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \begin[first-content-frame=frame]{pagetemplate}
 \frame[id=frame, left=2cm, width=5.8cm, top=2cm, bottom=10cm]
diff --git a/tests/bug-80.sil b/tests/bug-80.sil
index 90889a074..063a92cb8 100644
--- a/tests/bug-80.sil
+++ b/tests/bug-80.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 
 \define[command=item]{\quad – \process}
 
diff --git a/tests/bug-865.sil b/tests/bug-865.sil
index 8b2bb3012..b82a36eb5 100644
--- a/tests/bug-865.sil
+++ b/tests/bug-865.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.pullquote]
 \use[module=packages.lorem]
diff --git a/tests/bug-990.sil b/tests/bug-990.sil
index 0ef9a521a..c12087fb2 100644
--- a/tests/bug-990.sil
+++ b/tests/bug-990.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \define[command=open-spread]{}
 \nofolios
diff --git a/tests/centering.sil b/tests/centering.sil
index 702321fff..b0ae8b687 100644
--- a/tests/centering.sil
+++ b/tests/centering.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 
 \ragged[right=true,left=true]{\lorem[words=100]}
diff --git a/tests/chapterverse.sil b/tests/chapterverse.sil
index d309b318a..ded8997a1 100644
--- a/tests/chapterverse.sil
+++ b/tests/chapterverse.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7,class=bible]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus]
 \begin{script}
diff --git a/tests/combining.sil b/tests/combining.sil
index 89c079f75..7ee1c4c6b 100644
--- a/tests/combining.sil
+++ b/tests/combining.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Gentium Plus,size=24pt]
 Ầ  Ầ
diff --git a/tests/counters.sil b/tests/counters.sil
index 6d581dc95..d6599a40e 100644
--- a/tests/counters.sil
+++ b/tests/counters.sil
@@ -1,5 +1,6 @@
 \begin[papersize=a6]{document}
 \nofolios
+\use[module=packages.retrograde,target=v0.15.0]
 \set[parameter=document.parindent,value=0pt]
 \font[family=Libertinus Serif]
 \use[module=packages.counters]
diff --git a/tests/cursive-shaping.sil b/tests/cursive-shaping.sil
index a70023414..57d3bd45d 100644
--- a/tests/cursive-shaping.sil
+++ b/tests/cursive-shaping.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,direction=RTL]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \language[main=ar]
diff --git a/tests/disappearing-skip.sil b/tests/disappearing-skip.sil
index 5300b852e..34cf537f2 100644
--- a/tests/disappearing-skip.sil
+++ b/tests/disappearing-skip.sil
@@ -1,4 +1,5 @@
 \begin[papersize=129mm x 198mm]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 Para 1.
 
 \skip[height=155mm]
diff --git a/tests/eject.sil b/tests/eject.sil
index 970473ed3..03b28a974 100644
--- a/tests/eject.sil
+++ b/tests/eject.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \pagetemplate[first-content-frame=a]{
 \frame[id=a,top=5%ph,bottom=95%ph,next=b,left=5%pw,right=28%pw]
diff --git a/tests/feat-1092-raw.sil b/tests/feat-1092-raw.sil
index cc36d2ef0..1e4cb6913 100644
--- a/tests/feat-1092-raw.sil
+++ b/tests/feat-1092-raw.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \use[module=packages.svg]
@@ -18,4 +19,4 @@ This is a plain text inline.
   A bit like a true verbatim.
 \lets[do]{weird things}% Yeah!
 }
-\end{document}
\ No newline at end of file
+\end{document}
diff --git a/tests/feat-1365-lists-alternate.sil b/tests/feat-1365-lists-alternate.sil
index 87709ad6c..07bb13c74 100644
--- a/tests/feat-1365-lists-alternate.sil
+++ b/tests/feat-1365-lists-alternate.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6, class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lists]
 \font[family=Libertinus Serif]% Default Gentium lacks the white circle.
 \nofolios
diff --git a/tests/feat-1365-lists-compact.sil b/tests/feat-1365-lists-compact.sil
index 3040fae45..10fac5d94 100644
--- a/tests/feat-1365-lists-compact.sil
+++ b/tests/feat-1365-lists-compact.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6, class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lists]
 \font[family=Libertinus Serif]% Default Gentium lacks the white circle.
 \nofolios
diff --git a/tests/feat-1365-lists-footnote.sil b/tests/feat-1365-lists-footnote.sil
index 5418482a7..1f44d4387 100644
--- a/tests/feat-1365-lists-footnote.sil
+++ b/tests/feat-1365-lists-footnote.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6, class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lists]
 \font[family=Libertinus Serif]% Default Gentium lacks the white circle.
 \nofolios
@@ -19,7 +20,7 @@
     \item{Level 2 Ft}
   \end{itemize}
   \item{Level 1 Ft}
-\end{itemize}            
+\end{itemize}
 }}
     \begin{itemize}
       \item{Level 3}
diff --git a/tests/feat-875-dotfill-alignment.sil b/tests/feat-875-dotfill-alignment.sil
index cb3c3d8a6..add5c385e 100644
--- a/tests/feat-875-dotfill-alignment.sil
+++ b/tests/feat-875-dotfill-alignment.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.leaders]
 \nofolios
 \neverindent
diff --git a/tests/feat-875-leaders-alignment.sil b/tests/feat-875-leaders-alignment.sil
index fda2cdc09..10cd9ca15 100644
--- a/tests/feat-875-leaders-alignment.sil
+++ b/tests/feat-875-leaders-alignment.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.leaders]
 \nofolios
 \neverindent
diff --git a/tests/feat-875-leaders-fixed-alignment.sil b/tests/feat-875-leaders-fixed-alignment.sil
index 6878f0acb..cf8fea785 100644
--- a/tests/feat-875-leaders-fixed-alignment.sil
+++ b/tests/feat-875-leaders-fixed-alignment.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.leaders]
 \nofolios
 \neverindent
diff --git a/tests/feat-fullrule-hfillrule.sil b/tests/feat-fullrule-hfillrule.sil
index 2ba797163..3b58f7553 100644
--- a/tests/feat-fullrule-hfillrule.sil
+++ b/tests/feat-fullrule-hfillrule.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \use[module=packages.rules]
diff --git a/tests/feat-italic-correction.sil b/tests/feat-italic-correction.sil
index 8820db833..7f2077549 100644
--- a/tests/feat-italic-correction.sil
+++ b/tests/feat-italic-correction.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \font[size=15pt]
@@ -43,7 +44,7 @@
 
 % Enabled
 \set[parameter=typesetter.italicCorrection, value=true]
-+ \em{fluff}! \em{fluff} fluff aaaaaaa aaaa aaaaaa \em{fluff} fluff 
++ \em{fluff}! \em{fluff} fluff aaaaaaa aaaa aaaaaa \em{fluff} fluff
 
 % Repeated with another font
 \font[family=Cormorant Infant]
diff --git a/tests/fluent.sil b/tests/fluent.sil
index f78935f53..dbee08d7b 100644
--- a/tests/fluent.sil
+++ b/tests/fluent.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 % Output a message with variable replacement
diff --git a/tests/font-features-cvXX.sil b/tests/font-features-cvXX.sil
index de0b9826d..e266d2038 100644
--- a/tests/font-features-cvXX.sil
+++ b/tests/font-features-cvXX.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \use[module=packages.features]
diff --git a/tests/footnote-skip.sil b/tests/footnote-skip.sil
index 104cee520..4babbb28d 100644
--- a/tests/footnote-skip.sil
+++ b/tests/footnote-skip.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \use[module=packages.rules]
 \begin{script}
diff --git a/tests/footnote.sil b/tests/footnote.sil
index 53432aec3..f925d5e1c 100644
--- a/tests/footnote.sil
+++ b/tests/footnote.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.lorem]
 \font[family=Gentium Plus,size=10pt]
diff --git a/tests/grid.sil b/tests/grid.sil
index b5bdbd28f..3d7f7c303 100644
--- a/tests/grid.sil
+++ b/tests/grid.sil
@@ -1,4 +1,6 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \use[module=packages.grid]
 \use[module=packages.frametricks]
diff --git a/tests/hangafter.sil b/tests/hangafter.sil
index 72e36f057..658afcc06 100644
--- a/tests/hangafter.sil
+++ b/tests/hangafter.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.lorem]
 \set[parameter=document.parskip,value=1ex]
diff --git a/tests/image.sil b/tests/image.sil
index ea50fbd0f..ef03f44ab 100644
--- a/tests/image.sil
+++ b/tests/image.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.image]
 One two \img[src=documentation/fig1.png,width=50] three
 
diff --git a/tests/inc/bug-337.lua b/tests/inc/bug-337.lua
index f6624cd7e..82e9dad7f 100644
--- a/tests/inc/bug-337.lua
+++ b/tests/inc/bug-337.lua
@@ -4,11 +4,11 @@ local package = pl.class(base)
 package._name = "bug-337"
 
 
-function package:_init (class)
+function package:_init (options)
 
-  base._init(self, class)
+  base._init(self, options)
 
-  class:defineMaster({
+  self.class:defineMaster({
       id = "right",
       firstContentFrame = "content",
       frames = {
@@ -26,15 +26,15 @@ function package:_init (class)
         }
       }
     })
-  class:defineMaster({
+  self.class:defineMaster({
       id = "left",
       firstContentFrame = "content",
       frames = {}
     })
-  class:mirrorMaster("right", "left")
-  class:switchMasterOnePage("right")
+  self.class:mirrorMaster("right", "left")
+  self.class:switchMasterOnePage("right")
 
-  class:loadPackage("cropmarks")
+  self.class:loadPackage("cropmarks")
 
 end
 
diff --git a/tests/inline-lua.sil b/tests/inline-lua.sil
index 174335f2c..9cecda9bf 100644
--- a/tests/inline-lua.sil
+++ b/tests/inline-lua.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 % A real comment
 \begin{script}
 answer = { output = tostring(3 * 3 % 5) }
diff --git a/tests/kannada.sil b/tests/kannada.sil
index 8d0e49d2e..8f9d232f9 100644
--- a/tests/kannada.sil
+++ b/tests/kannada.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \noindent
 \font[family=Libertinus Serif,size=16pt]
diff --git a/tests/letterspacing.sil b/tests/letterspacing.sil
index 9d44e0852..9a319ab2c 100644
--- a/tests/letterspacing.sil
+++ b/tests/letterspacing.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 
 No letterspacing.
 
diff --git a/tests/linespacing.sil b/tests/linespacing.sil
index e90724b75..90f2d22eb 100644
--- a/tests/linespacing.sil
+++ b/tests/linespacing.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \nofolios
 \font[family=Libertinus Serif,size=12pt]
diff --git a/tests/linespacing2.sil b/tests/linespacing2.sil
index a56580c73..c753e17fb 100644
--- a/tests/linespacing2.sil
+++ b/tests/linespacing2.sil
@@ -1,4 +1,5 @@
 \begin{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Libertinus Serif,size=11pt]
 \use[module=packages.linespacing]
diff --git a/tests/masters.sil b/tests/masters.sil
index f09a2ed95..a86b68e35 100644
--- a/tests/masters.sil
+++ b/tests/masters.sil
@@ -1,4 +1,5 @@
 \begin{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.masters]
 \use[module=packages.lorem]
 \use[module=packages.frametricks]
diff --git a/tests/math-bigops.xml b/tests/math-bigops.xml
index b10e6805e..a4d714423 100644
--- a/tests/math-bigops.xml
+++ b/tests/math-bigops.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Big operators, text, MathML:
diff --git a/tests/math-fractions.xml b/tests/math-fractions.xml
index 64e6e347d..46125a2e3 100644
--- a/tests/math-fractions.xml
+++ b/tests/math-fractions.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Fractions, text, MathML:
diff --git a/tests/math-ops.sil b/tests/math-ops.sil
index 200c00ae1..229a3d61a 100644
--- a/tests/math-ops.sil
+++ b/tests/math-ops.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 
 \script[src=packages/math]
 
diff --git a/tests/math-spaces.sil b/tests/math-spaces.sil
index db1ca80fc..937d4bbed 100644
--- a/tests/math-spaces.sil
+++ b/tests/math-spaces.sil
@@ -1,4 +1,5 @@
 \begin[class=plain]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 
 \script[src=packages/math]
 
diff --git a/tests/math-stretchy.xml b/tests/math-stretchy.xml
index 2dbb47547..a3c8ba33f 100644
--- a/tests/math-stretchy.xml
+++ b/tests/math-stretchy.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Stretchy parentheses, text, MathML:
diff --git a/tests/math-subsup.xml b/tests/math-subsup.xml
index 0b5bb7663..dec315905 100644
--- a/tests/math-subsup.xml
+++ b/tests/math-subsup.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Sub-superscripts, text, MathML:
diff --git a/tests/math-tables-mathml.xml b/tests/math-tables-mathml.xml
index 79ecabb10..7ebdfe5db 100644
--- a/tests/math-tables-mathml.xml
+++ b/tests/math-tables-mathml.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Number matrix, text, MathML:
diff --git a/tests/math-tables-tex.sil b/tests/math-tables-tex.sil
index e22730bad..924bfb327 100644
--- a/tests/math-tables-tex.sil
+++ b/tests/math-tables-tex.sil
@@ -1,4 +1,5 @@
 \begin[class=plain]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 
 \use[module=packages.math]
 
diff --git a/tests/math-variants.xml b/tests/math-variants.xml
index 0e08d9ad4..5850deabe 100644
--- a/tests/math-variants.xml
+++ b/tests/math-variants.xml
@@ -1,4 +1,5 @@
 <sile>
+<use module="packages.retrograde" target="v0.15.0" />
 <use module="packages.math"/>
 
 Math variants, text, MathML:
diff --git a/tests/mini-arabic.sil b/tests/mini-arabic.sil
index 039b64745..206cf89aa 100644
--- a/tests/mini-arabic.sil
+++ b/tests/mini-arabic.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.bidi]
 \thisframeRTL
diff --git a/tests/mlcounter.sil b/tests/mlcounter.sil
index f0c62a1ea..617c86dc7 100644
--- a/tests/mlcounter.sil
+++ b/tests/mlcounter.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.counters]
 
 \increment-multilevel-counter[id=test]
diff --git a/tests/negative-spaces-in-line.sil b/tests/negative-spaces-in-line.sil
index 4838acb3a..cd44cdcd4 100644
--- a/tests/negative-spaces-in-line.sil
+++ b/tests/negative-spaces-in-line.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,direction=RTL-TTB]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 \font[family=Awami Nastaliq,size=22]
diff --git a/tests/nondeterminism.sil b/tests/nondeterminism.sil
index 07412c8a1..c003469dd 100644
--- a/tests/nondeterminism.sil
+++ b/tests/nondeterminism.sil
@@ -1,6 +1,7 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[size=11pt,family=Gentium Plus]
-\noindent{}Now that we understand some of what SILE is about and what it seeks to do, 
+\noindent{}Now that we understand some of what SILE is about and what it seeks to do,
 let’s dive into SILE itself.
 \end{document}
diff --git a/tests/parshaping-simple.sil b/tests/parshaping-simple.sil
index 1f7e8ebfc..d695f4b60 100644
--- a/tests/parshaping-simple.sil
+++ b/tests/parshaping-simple.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a7]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \use[module=packages.lorem]
 \begin{script}
diff --git a/tests/rskip.sil b/tests/rskip.sil
index 1c2e1b393..97cba4ef4 100644
--- a/tests/rskip.sil
+++ b/tests/rskip.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a5,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \set[parameter=document.rskip,value=20mm]
 \lorem[words=50]
diff --git a/tests/settings.sil b/tests/settings.sil
index 03e13b2cb..e352a2fbf 100644
--- a/tests/settings.sil
+++ b/tests/settings.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \neverindent
 foo
diff --git a/tests/split-footnote.sil b/tests/split-footnote.sil
index 9c5201416..5afe6e1ee 100644
--- a/tests/split-footnote.sil
+++ b/tests/split-footnote.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \use[module=packages.lorem]
 \nofolios
 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
diff --git a/tests/sura-2.sil b/tests/sura-2.sil
index f077563a4..b845eef3d 100644
--- a/tests/sura-2.sil
+++ b/tests/sura-2.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6,direction=RTL]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[family=Amiri Quran,size=20pt]
 \use[module=packages.linespacing]
diff --git a/tests/tracking.sil b/tests/tracking.sil
index 6b730039b..ce5c707f9 100644
--- a/tests/tracking.sil
+++ b/tests/tracking.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 \font[size=20pt]
 \set[parameter=document.parindent,value=0]
diff --git a/tests/twoside.sil b/tests/twoside.sil
index 45cac8390..837879def 100644
--- a/tests/twoside.sil
+++ b/tests/twoside.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a8,class=book]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 % Note folio suppression on some pages are part of test
 \begin[command=stuff]{define}
diff --git a/tests/variations-axis.sil b/tests/variations-axis.sil
index bc43280d5..4103ead91 100644
--- a/tests/variations-axis.sil
+++ b/tests/variations-axis.sil
@@ -1,4 +1,5 @@
 \begin[papersize=a6]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \neverindent
 \nofolios
 \font[family=Tourney,size=48pt]
diff --git a/tests/vertical.sil b/tests/vertical.sil
index 3c9fcf787..faaae3f17 100644
--- a/tests/vertical.sil
+++ b/tests/vertical.sil
@@ -1,4 +1,5 @@
 \begin[class=jplain,layout=tate]{document}
+\use[module=packages.retrograde,target=v0.15.0]
 \nofolios
 % Note: differences between Noto font versions make adding more characters to
 % this test brittle. For example 日本は昔からruns into trouble when the height