diff --git a/lisp/progmodes/cperl-mode.el b/lisp/progmodes/cperl-mode.el
index 8643b69ef83..1e2aca73161 100644
--- a/lisp/progmodes/cperl-mode.el
+++ b/lisp/progmodes/cperl-mode.el
@@ -2766,7 +2766,7 @@ PARSE-DATA is used to save status between calls in a loop."
 START is a good place to start parsing, or equal to
 PARSE-START if preset.
 STATE is what is returned by `parse-partial-sexp'.
-DEPTH is true is we are immediately after end of block
+DEPTH is true if we are immediately after end of block
 which contains START.
 PRESTART is the position basing on which START was found.
 START-STATE should be a good guess for the start of a function."
@@ -2775,7 +2775,7 @@ START-STATE should be a good guess for the start of a function."
       (if (and parse-start
 	       (<= parse-start start-point))
 	  (goto-char parse-start)
-	(beginning-of-defun)
+	(beginning-of-defun-raw)
         (when (cperl-declaration-header-p (point))
           (goto-char (cperl-beginning-of-property (point) 'syntax-type))
           (beginning-of-line))
diff --git a/test/lisp/progmodes/cperl-mode-resources/cperl-indents.erts b/test/lisp/progmodes/cperl-mode-resources/cperl-indents.erts
index ab00e9ce6d4..3a779442a8a 100644
--- a/test/lisp/progmodes/cperl-mode-resources/cperl-indents.erts
+++ b/test/lisp/progmodes/cperl-mode-resources/cperl-indents.erts
@@ -98,3 +98,28 @@ Name: cperl-keyword-without-space
 my %h = map{$_=>1}
   @ARGV;
 =-=-=
+
+Name: cperl-subroutine-signatures
+
+=-=
+# -*- mode: cperl -*-
+# John Ciolfi reported as Bug#79269
+use strict;
+use warnings;
+use experimental 'signatures';
+
+foo(1);
+
+sub foo (
+	 $in1,
+	 $optionsHPtr = {},
+	 $otherOption1 = 1,	# Bug: wrong face for this option
+	) {
+
+  my $a = 1;			# Bug: should be indented by 2 spaces
+
+  # Bug: following are not indented due to use of signatures
+  my $b = 2;
+  return $a + $b + $in1;
+}
+=-=-=
diff --git a/test/lisp/progmodes/cperl-mode-tests.el b/test/lisp/progmodes/cperl-mode-tests.el
index 00116986b4b..469345e74c9 100644
--- a/test/lisp/progmodes/cperl-mode-tests.el
+++ b/test/lisp/progmodes/cperl-mode-tests.el
@@ -1605,6 +1605,9 @@ It must not be mistaken for \"$)\"."
      (forward-line 1))))
 
 (ert-deftest test-indentation ()
+  ;; The erts file explicitly invokes cperl-mode, so skip in perl-mode.
+  ;; Indentation defaults are different, so it won't pass in perl-mode
+  (skip-unless (eq cperl-test-mode #'cperl-mode))
   (ert-test-erts-file (ert-resource-file "cperl-indents.erts")))
 
 ;;; cperl-mode-tests.el ends here