diff --git a/test/integration/jw-pkg/projects/cache/Makefile b/test/integration/jw-pkg/projects/cache/Makefile
new file mode 100644
index 00000000..3ac59759
--- /dev/null
+++ b/test/integration/jw-pkg/projects/cache/Makefile
@@ -0,0 +1,29 @@
+# This file runs commands typically used during initial Makefile caching.
+#
+# It's especially useful to run them in an explicit test, because they are used
+# to fill Makefile variables, and if they fail, they leave an empty variable
+# behind instead of failing the build entirely.
+
+export JW_DEFAULT_SHOW_BACKTRACE = true
+
+TOPDIR = ../../../../..
+
+include $(TOPDIR)/make/proj.mk
+include $(TOPDIR)/make/test-jw-pkg.mk
+
+all:
+
+test: test.integration.in-tree
+test.integration.in-tree:
+	$(TEST_CMD_LINE) --topdir-format absolute platform info --format "%{gnu-triplet} %{cascade}"
+	$(TEST_CMD_LINE) --topdir-format absolute platform info --format %{id}-%{codename}
+	$(TEST_CMD_LINE) --topdir-format absolute projects pkg-requires --no-subpackages --subsections=jw --syntax names-only --delimiter " " "build devel" jw-pkg
+	$(TEST_CMD_LINE) --topdir-format absolute projects pkg-requires --no-subpackages --subsections=jw --syntax names-only --delimiter " " run jw-pkg
+	$(TEST_CMD_LINE) --topdir-format absolute projects proj-dir jw-pkg
+	$(TEST_CMD_LINE) --topdir-format absolute projects pythonpath --delimiter " " jw-pkg
+	$(TEST_CMD_LINE) --topdir-format relative projects pythonpath --prefix '$$MYPY_CONFIG_FILE_DIR/' jw-pkg
+	$(TEST_CMD_LINE) --topdir-format unaltered projects create-file --format tmpl --template-name pyproject.toml --search-path $(TOPDIR)/conf/templates --field "mypypath=mypy_path = "$MYPY_CONFIG_FILE_DIR/src/python"" jw-pkg > test-pyproject.toml
+	$(TEST_CMD_LINE) --topdir-format unaltered projects create-file --format pyright --field base=./conf/project/pyrightconfig-base.json --field include=src/python jw-pkg > test-pyrightconfig.json
+clean: test.integration.in-tree.clean
+test.integration.in-tree.clean:
+	rm -f test-*.*