diff --git a/tests/python/dca.test b/tests/python/dca.test
index 894988951..f376656b6 100755
--- a/tests/python/dca.test
+++ b/tests/python/dca.test
@@ -23,7 +23,10 @@ set -e
 # Skip this test if ltl2dstar is not installed.
 (ltl2dstar --version) || exit 77
 
-cat >ba_formulas << 'EOF'
+DIR=dca.dir
+mkdir -p $DIR
+
+cat >$DIR/ba_formulas << 'EOF'
 FG((Xc & XXa) <-> !(b xor (c M b)))
 F!FGFb
 XF(b & Ga)
@@ -40,7 +43,7 @@ XF((!c R a) W !Fb)
 (!a <-> !(c <-> Gb)) M 1
 ((0 R a) M c) M ((b xor Fb) M F(b -> a))
 EOF
-cat >dsa_formulas <<'EOF'
+cat >$DIR/dsa_formulas <<'EOF'
 (!b U b) U X(!a -> Fb)
 1 U (a xor b)
 X(!(!b | (a M b)) -> XXa)
@@ -48,11 +51,11 @@ X(!(!b | (a M b)) -> XXa)
 F(XF!a & (Fb U !a))
 EOF
 while read ba_f; do
-  $srcdir/../run "$srcdir/dca.py" "$ba_f" > ba
+  ../run "$srcdir/dca.py" "$ba_f" > ba
   while read dsa_f; do
     ltldo -f "$dsa_f" "ltl2dstar --automata=streett\
-      --ltl2nba=spin:ltl2tgba@-Ds" -H | autfilt --product=ba > input.hoa
-    autfilt --dca input.hoa > res.hoa
-    autfilt input.hoa --equivalent-to res.hoa
-  done <dsa_formulas
-done <ba_formulas
+      --ltl2nba=spin:ltl2tgba@-Ds" -H | autfilt --product=ba > $DIR/input.hoa
+    autfilt --dca $DIR/input.hoa > $DIR/res.hoa
+    autfilt $DIR/input.hoa --equivalent-to $DIR/res.hoa
+  done <$DIR/dsa_formulas
+done <$DIR/ba_formulas