diff --git a/tests/rtlil/.gitignore b/tests/rtlil/.gitignore
index e1661c060..abe251a76 100644
--- a/tests/rtlil/.gitignore
+++ b/tests/rtlil/.gitignore
@@ -1,2 +1 @@
-*.tmp.il
-*.tmp.il.bak
\ No newline at end of file
+/temp
\ No newline at end of file
diff --git a/tests/rtlil/roundtrip-design.sh b/tests/rtlil/roundtrip-design.sh
index beacddd8f..018e363c7 100644
--- a/tests/rtlil/roundtrip-design.sh
+++ b/tests/rtlil/roundtrip-design.sh
@@ -1,8 +1,10 @@
 set -euo pipefail
 YS=../../yosys
 
-$YS -p "read_verilog -sv everything.v; write_rtlil roundtrip-design-push.tmp.il; design -push; design -pop; write_rtlil roundtrip-design-pop.tmp.il"
-diff roundtrip-design-push.tmp.il roundtrip-design-pop.tmp.il
+mkdir -p temp
 
-$YS -p "read_verilog -sv everything.v; write_rtlil roundtrip-design-save.tmp.il; design -save foo; design -load foo; write_rtlil roundtrip-design-load.tmp.il"
-diff roundtrip-design-save.tmp.il roundtrip-design-load.tmp.il
+$YS -p "read_verilog -sv everything.v; write_rtlil temp/roundtrip-design-push.il; design -push; design -pop; write_rtlil temp/roundtrip-design-pop.il"
+diff temp/roundtrip-design-push.il temp/roundtrip-design-pop.il
+
+$YS -p "read_verilog -sv everything.v; write_rtlil temp/roundtrip-design-save.il; design -save foo; design -load foo; write_rtlil temp/roundtrip-design-load.il"
+diff temp/roundtrip-design-save.il temp/roundtrip-design-load.il
diff --git a/tests/rtlil/roundtrip-text.sh b/tests/rtlil/roundtrip-text.sh
index 7dd0327ca..45db7ee72 100644
--- a/tests/rtlil/roundtrip-text.sh
+++ b/tests/rtlil/roundtrip-text.sh
@@ -1,30 +1,32 @@
 set -euo pipefail
 YS=../../yosys
 
+mkdir -p temp
+
 # write_rtlil and dump are equivalent
-$YS -p "read_verilog -sv everything.v; copy alu zzz; proc zzz; dump -o roundtrip-text.dump.tmp.il; write_rtlil roundtrip-text.write.tmp.il"
-sed '/^$/d' -i.bak roundtrip-text.dump.tmp.il
-sed '/^$/d' -i.bak roundtrip-text.write.tmp.il
+$YS -p "read_verilog -sv everything.v; copy alu zzz; proc zzz; dump -o temp/roundtrip-text.dump.il; write_rtlil temp/roundtrip-text.write.il"
+sed '/^$/d' -i.bak temp/roundtrip-text.dump.il
+sed '/^$/d' -i.bak temp/roundtrip-text.write.il
 # Trim first line ("Generated by Yosys ...")
-tail -n +2 roundtrip-text.write.tmp.il > roundtrip-text.write-nogen.tmp.il
-diff roundtrip-text.dump.tmp.il roundtrip-text.write-nogen.tmp.il
-diff roundtrip-text.dump.tmp.il roundtrip-text.ref.il
+tail -n +2 temp/roundtrip-text.write.il > temp/roundtrip-text.write-nogen.il
+diff temp/roundtrip-text.dump.il temp/roundtrip-text.write-nogen.il
+diff temp/roundtrip-text.dump.il roundtrip-text.ref.il
 
 # Loading and writing it out again doesn't change the RTLIL
-$YS -p "read_rtlil roundtrip-text.dump.tmp.il; write_rtlil roundtrip-text.reload.tmp.il"
-sed '/^$/d' -i.bak roundtrip-text.reload.tmp.il
-tail -n +2 roundtrip-text.reload.tmp.il > roundtrip-text.reload-nogen.tmp.il
-diff roundtrip-text.dump.tmp.il roundtrip-text.reload-nogen.tmp.il
+$YS -p "read_rtlil temp/roundtrip-text.dump.il; write_rtlil temp/roundtrip-text.reload.il"
+sed '/^$/d' -i.bak temp/roundtrip-text.reload.il
+tail -n +2 temp/roundtrip-text.reload.il > temp/roundtrip-text.reload-nogen.il
+diff temp/roundtrip-text.dump.il temp/roundtrip-text.reload-nogen.il
 
 # Hashing differences don't change the RTLIL
-$YS --hash-seed=2345678 -p "read_rtlil roundtrip-text.dump.tmp.il; write_rtlil roundtrip-text.reload-hash.tmp.il"
-sed '/^$/d' -i.bak roundtrip-text.reload-hash.tmp.il
-tail -n +2 roundtrip-text.reload-hash.tmp.il > roundtrip-text.reload-hash-nogen.tmp.il
-diff roundtrip-text.dump.tmp.il roundtrip-text.reload-hash-nogen.tmp.il
+$YS --hash-seed=2345678 -p "read_rtlil temp/roundtrip-text.dump.il; write_rtlil temp/roundtrip-text.reload-hash.il"
+sed '/^$/d' -i.bak temp/roundtrip-text.reload-hash.il
+tail -n +2 temp/roundtrip-text.reload-hash.il > temp/roundtrip-text.reload-hash-nogen.il
+diff temp/roundtrip-text.dump.il temp/roundtrip-text.reload-hash-nogen.il
 
 echo "Without ABC, we don't get any irreproducibility and can pin that"
 echo "Has this test case started failing for you? Consider updating the reference"
-$YS -p "read_verilog -sv everything.v; synth -noabc; write_rtlil roundtrip-text.synth.tmp.il"
-sed '/^$/d' -i.bak roundtrip-text.synth.tmp.il
-tail -n +2 roundtrip-text.synth.tmp.il > roundtrip-text.synth-nogen.tmp.il
-diff roundtrip-text.synth-nogen.tmp.il roundtrip-text.synth.ref.il
+$YS -p "read_verilog -sv everything.v; synth -noabc; write_rtlil temp/roundtrip-text.synth.il"
+sed '/^$/d' -i.bak temp/roundtrip-text.synth.il
+tail -n +2 temp/roundtrip-text.synth.il > temp/roundtrip-text.synth-nogen.il
+diff temp/roundtrip-text.synth-nogen.il roundtrip-text.synth.ref.il