4 files changed, 15 insertions, 15 deletions
diff --git a/test/lhs-test.latex b/test/lhs-test.latex
index 32042b103..fdc344335 100644
--- a/test/lhs-test.latex
+++ b/test/lhs-test.latex
@@ -6,8 +6,8 @@
 ]{article}
 \usepackage{amsmath,amssymb}
 \usepackage{lmodern}
-\usepackage{ifxetex,ifluatex}
-\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+\usepackage{iftex}
+\ifPDFTeX
   \usepackage[T1]{fontenc}
   \usepackage[utf8]{inputenc}
   \usepackage{textcomp} % provide euro and other symbols
@@ -81,7 +81,7 @@
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
 \setcounter{secnumdepth}{-\maxdimen} % remove section numbering
-\ifluatex
+\ifLuaTeX
   \usepackage{selnolig}  % disable illegal ligatures
 \fi
 
diff --git a/test/lhs-test.latex+lhs b/test/lhs-test.latex+lhs
index 4bc674f4a..f9149ba02 100644
--- a/test/lhs-test.latex+lhs
+++ b/test/lhs-test.latex+lhs
@@ -6,8 +6,8 @@
 ]{article}
 \usepackage{amsmath,amssymb}
 \usepackage{lmodern}
-\usepackage{ifxetex,ifluatex}
-\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+\usepackage{iftex}
+\ifPDFTeX
   \usepackage[T1]{fontenc}
   \usepackage[utf8]{inputenc}
   \usepackage{textcomp} % provide euro and other symbols
@@ -48,7 +48,7 @@
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
 \setcounter{secnumdepth}{-\maxdimen} % remove section numbering
-\ifluatex
+\ifLuaTeX
   \usepackage{selnolig}  % disable illegal ligatures
 \fi
 
diff --git a/test/writer.latex b/test/writer.latex
index 7fc707b27..abf772df4 100644
--- a/test/writer.latex
+++ b/test/writer.latex
@@ -6,8 +6,8 @@
 ]{article}
 \usepackage{amsmath,amssymb}
 \usepackage{lmodern}
-\usepackage{ifxetex,ifluatex}
-\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+\usepackage{iftex}
+\ifPDFTeX
   \usepackage[T1]{fontenc}
   \usepackage[utf8]{inputenc}
   \usepackage{textcomp} % provide euro and other symbols
@@ -63,7 +63,7 @@
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
 \setcounter{secnumdepth}{-\maxdimen} % remove section numbering
-\ifluatex
+\ifLuaTeX
   \usepackage{selnolig}  % disable illegal ligatures
 \fi
 
diff --git a/test/writers-lang-and-dir.latex b/test/writers-lang-and-dir.latex
index 1172d23a2..d91f77325 100644
--- a/test/writers-lang-and-dir.latex
+++ b/test/writers-lang-and-dir.latex
@@ -7,8 +7,8 @@
 ]{article}
 \usepackage{amsmath,amssymb}
 \usepackage{lmodern}
-\usepackage{ifxetex,ifluatex}
-\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+\usepackage{iftex}
+\ifPDFTeX
   \usepackage[T1]{fontenc}
   \usepackage[utf8]{inputenc}
   \usepackage{textcomp} % provide euro and other symbols
@@ -45,7 +45,7 @@
 \providecommand{\tightlist}{%
   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
 \setcounter{secnumdepth}{-\maxdimen} % remove section numbering
-\ifxetex
+\ifXeTeX
   % Load polyglossia as late as possible: uses bidi with RTL langages (e.g. Hebrew, Arabic)
   \usepackage{polyglossia}
   \setmainlanguage[]{english}
@@ -69,14 +69,14 @@
   \newcommand{\textfrench}[2][]{\foreignlanguage{french}{#2}}
   \newenvironment{french}[2][]{\begin{otherlanguage}{french}}{\end{otherlanguage}}
 \fi
-\ifluatex
+\ifLuaTeX
   \usepackage{selnolig}  % disable illegal ligatures
 \fi
-\ifxetex
+\ifXeTeX
   % Load bidi as late as possible as it modifies e.g. graphicx
   \usepackage{bidi}
 \fi
-\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
+\ifPDFTeX
   \TeXXeTstate=1
   \newcommand{\RL}[1]{\beginR #1\endR}
   \newcommand{\LR}[1]{\beginL #1\endL}