diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 66bad21..b6232ee 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
   test:
     strategy:
       matrix:
-        platform: [ubuntu-latest, macos-latest, windows-latest]
+        platform: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v2
diff --git a/Makefile b/Makefile
index 828a90d..1386819 100644
--- a/Makefile
+++ b/Makefile
@@ -37,9 +37,9 @@ dist: $(DISTFILES) todo.sh
 	cp -f $(DISTFILES) $(DISTNAME)/
 	sed -e 's/@DEV_VERSION@/'$(VERSION)'/' todo.sh > $(DISTNAME)/todo.sh
 	chmod +x $(DISTNAME)/todo.sh
-	tar cf $(DISTNAME).tar $(DISTNAME)/
+	tar cf $(DISTNAME).tar $(DISTNAME)
 	gzip -f -9 $(DISTNAME).tar
-	zip -9r $(DISTNAME).zip $(DISTNAME)/
+	tar cf $(DISTNAME).zip $(DISTNAME)
 	rm -r $(DISTNAME)
 
 .PHONY: clean
diff --git a/tests/test-lib.sh b/tests/test-lib.sh
index 79d58f8..d5a7ac8 100644
--- a/tests/test-lib.sh
+++ b/tests/test-lib.sh
@@ -495,11 +495,18 @@ test_init_todo () {
 	#...
 	if date --version 2>&1 | grep -q "GNU"; then
 		DATE_STYLE=GNU
+	# on Mac OS X 10.15:
+	#date --version
+	#date: illegal option -- -
+	#usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
+	#            [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
+	elif date --version 2>&1 | grep -q -e "-jnRu"; then
+		DATE_STYLE=Mac10.15
 	# on Mac OS X 10.5:
 	#date --version
 	#date: illegal option -- -
 	#usage: date [-jnu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
-	#[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
+	#            [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
 	elif date --version 2>&1 | grep -q -e "-jnu"; then
 		DATE_STYLE=Mac10.5
 	# on Mac OS X 10.4:
@@ -519,6 +526,13 @@ test_init_todo () {
 			EOF
 			chmod 755 bin/date
 		;;
+		Mac10.15)
+			cat > bin/date <<-EOF
+			#!/bin/sh
+			exec "$TODO_TEST_REAL_DATE" -j -f %s \$TODO_TEST_TIME \$@
+			EOF
+			chmod 755 bin/date
+		;;
 		Mac10.5)
 			cat > bin/date <<-EOF
 			#!/bin/sh