Test rtestode fails if run after rtest3

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I have generated a reduced case. Running the two line
rtest3.mac before the four line rtestode.mac ends in failure.

How does one undo a DECLARE(INTEGRATE,NOUN); ?

/* rtest3.mac */
DECLARE(INTEGRATE,NOUN);
DONE$

/* rtestode.mac */
kill(all);
done;
ode2(x^2*cos(x*y)*'diff(y,x) + (sin(x*y)+x*y*(cos(x*y)))=0, y,
x);
x*sin(x*y)=%C;

##### Test output ###

Testing rtestode.mac
/* ********************** Problem 1. *************** */
%Input is
KILL(ALL)

The result is
DONE

..Which was correct
/* ********************** Problem 2. *************** */
%Input is
2 dy
ODE2(x y COS(x y) + SIN(x y) + x COS(x y) -- = 0, y, x)
dx

The result is
/
[
x SIN(x y) + I 0 dy = %C
]
/

Using ratsimp
Using ratsimp
This differed from the expected result:
x SIN(x y) = %C

The number of differences found was 1 in problems: (2)
Error summary:
Error(s) found in rtestode.mac: (2)

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Appears to be fixed by revision of kill in r1.22
src/suprv1.lisp (2005/04/03). Maxima 5.9.1 official release
on cmucl 19a and 5.9.1cvs on clisp 2.31, build date
2005/03/31, both show this bug. 5.9.1cvs on clisp 2.33 and
on gcl 2.6.6, build date 2005/08/21, do not show it. Closing
this bug as fixed.