diff --git a/.editorconfig b/.editorconfig
index cc458e2..f5bb98e 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -13,3 +13,6 @@ indent_size = 2
 
 [{Makefile,README,*.pl,*.sh,*.l,*.h}]
 indent_style = tab
+
+[{*.txt,*.tex}]
+insert_final_newline = false
diff --git a/Makefile b/Makefile
index 29f6c2c..c370ec4 100644
--- a/Makefile
+++ b/Makefile
@@ -158,3 +158,7 @@ package: clean detex.c
 detex.c: detex.h
 detex.c: detex.l
 
+inpdf:
+	cd test && xelatex -interaction=nonstopmode in.tex || echo there were errors
+	rm -f test/*.toc test/*.log test/*.aux
+	mv test/in.pdf .
diff --git a/test.pl b/test.pl
index 0272c55..cbac267 100755
--- a/test.pl
+++ b/test.pl
@@ -1,5 +1,7 @@
 #!/usr/bin/perl -w
 
+use strict;
+
 assert_produces_correct_output('in.tex', 'correct.txt');
 assert_produces_correct_output('in.tex', 'correct.txt', '-l');
 assert_produces_correct_output('noinclude.tex', 'noinclude-correct.txt', '-n');
@@ -12,7 +14,11 @@
 run_for_wrong_input("non-existent-file");
 run_for_wrong_input("non-existent-file.tex");
 run_for_wrong_input("non-existent-file.txt");
-run_for_wrong_input("test/unterminated.txt");
+run_for_wrong_input("test/unterminated.tex");
+run_for_wrong_input("test/unterminated-verb-pipe.tex");
+
+run_for_input_with_error("test/unterminated-verb.tex");
+run_for_input_with_error("test/unterminated-verb-eol.tex");
 
 print "Tests ok\n";
 
@@ -46,9 +52,18 @@ sub run_for_wrong_input {
 	execute_cmd("./delatex $input");
 }
 
+sub run_for_input_with_error {
+	my ($input) = @_;
+	print "Checking response for $input...\n";
+	# https://www.perlmonks.org/?node_id=81640
+	my $res = system(get_cmd("./delatex $input")) >> 8;
+	die "exit code $res" if ($res != 1);
+}
+
 sub execute_cmd {
 	my ($cmd) = @_;
-	system(get_cmd($cmd)) == 0 or die;
+	my $res = system(get_cmd($cmd));
+	die "exit code $res" if ($res != 0);
 }
 
 sub get_cmd {
diff --git a/test/unterminated-verb-eol.tex b/test/unterminated-verb-eol.tex
new file mode 100644
index 0000000..c54558b
--- /dev/null
+++ b/test/unterminated-verb-eol.tex
@@ -0,0 +1,4 @@
+\documentclass[draft]{book}
+\begin{document}
+\verb+ok+
+\verb
\ No newline at end of file
diff --git a/test/unterminated-verb-pipe.tex b/test/unterminated-verb-pipe.tex
new file mode 100644
index 0000000..ca82438
--- /dev/null
+++ b/test/unterminated-verb-pipe.tex
@@ -0,0 +1,4 @@
+\documentclass[draft]{book}
+\begin{document}
+\verb+ok+
+\verb|
diff --git a/test/unterminated-verb.tex b/test/unterminated-verb.tex
new file mode 100644
index 0000000..d6b64c4
--- /dev/null
+++ b/test/unterminated-verb.tex
@@ -0,0 +1,4 @@
+\documentclass[draft]{book}
+\begin{document}
+\verb+ok+
+\verb
diff --git a/test/unterminated.txt b/test/unterminated.tex
similarity index 100%
rename from test/unterminated.txt
rename to test/unterminated.tex