diff --git a/.github/scripts/remote-run-firesim-scala-tests.sh b/.github/scripts/remote-run-firesim-scala-tests.sh
index 6d475921..960d1706 100755
--- a/.github/scripts/remote-run-firesim-scala-tests.sh
+++ b/.github/scripts/remote-run-firesim-scala-tests.sh
@@ -16,4 +16,5 @@ cd $REMOTE_CHIPYARD_DIR
 # Run Firesim Scala Tests
 export FIRESIM_ENV_SOURCED=1;
 export COURSIER_CACHE=$REMOTE_WORK_DIR/.coursier-cache
-make -C $REMOTE_FIRESIM_DIR JAVA_OPTS="$REMOTE_JAVA_OPTS" SBT_OPTS="$REMOTE_SBT_OPTS" TARGET_SBT_PROJECT="{file:$REMOTE_CHIPYARD_DIR}firechip" testOnly ${mapping[$1]}
+JAVA_TOOL_OPTIONS="$REMOTE_JAVA_OPTS -Djava.io.tmpdir=$(mktemp -d -t cy-fsim-XXXXXXXX)"
+make -C $REMOTE_FIRESIM_DIR JAVA_TOOL_OPTIONS="$JAVA_TOOL_OPTIONS" SBT_OPTS="$REMOTE_SBT_OPTS" TARGET_SBT_PROJECT="{file:$REMOTE_CHIPYARD_DIR}firechip" testOnly ${mapping[$1]}