diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index ebf562b..47ae85a 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt*	For Vim version 9.1.  Last change: 2024 Jun 17
+*testing.txt*	For Vim version 9.1.  Last change: 2024 Jul 17
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -506,16 +506,17 @@
 		added to |v:errors| and 1 is returned.  Otherwise zero is
 		returned. |assert-return|
 		The error is in the form "Expected {expected} but got
-		{actual}".  When {msg} is present it is prefixed to that.
+		{actual}".  When {msg} is present it is prefixed to that, along
+		with the location of the assert when run from a script.
 
 		There is no automatic conversion, the String "4" is different
 		from the Number 4.  And the number 4 is different from the
 		Float 4.0.  The value of 'ignorecase' is not used here, case
 		always matters.
 		Example: >
-	assert_equal('foo', 'bar')
-<		Will result in a string to be added to |v:errors|:
-	test.vim line 12: Expected 'foo' but got 'bar' ~
+			call assert_equal('foo', 'bar', 'baz')
+<		Will add the following to |v:errors|:
+			test.vim line 12: baz: Expected 'foo' but got 'bar' ~
 
 		Can also be used as a |method|, the base is passed as the
 		second argument: >
@@ -599,7 +600,8 @@
 		When {actual} is not false an error message is added to
 		|v:errors|, like with |assert_equal()|.
 		The error is in the form "Expected False but got {actual}".
-		When {msg} is present it is prepended to that.
+		When {msg} is present it is prepended to that, along
+		with the location of the assert when run from a script.
 		Also see |assert-return|.
 
 		A value is false when it is zero. When {actual} is not a
@@ -625,7 +627,8 @@
 		When {pattern} does not match {actual} an error message is
 		added to |v:errors|.  Also see |assert-return|.
 		The error is in the form "Pattern {pattern} does not match
-		{actual}".  When {msg} is present it is prefixed to that.
+		{actual}".  When {msg} is present it is prefixed to that,
+		along with the location of the assert when run from a script.
 
 		{pattern} is used as with |=~|: The matching is always done
 		like 'magic' was set and 'cpoptions' is empty, no matter what
@@ -636,7 +639,7 @@
 		Use both to match the whole text.
 
 		Example: >
-	assert_match('^f.*o$', 'foobar')
+			assert_match('^f.*o$', 'foobar')
 <		Will result in a string to be added to |v:errors|:
 	test.vim line 12: Pattern '^f.*o$' does not match 'foobar' ~
 
@@ -693,7 +696,8 @@
 		Also see |assert-return|.
 		A value is TRUE when it is a non-zero number.  When {actual}
 		is not a number the assert fails.
-		When {msg} is given it precedes the default message.
+		When {msg} is given it precedes the default message, along
+		with the location of the assert when run from a script.
 
 		Can also be used as a |method|: >
 			GetResult()->assert_true()