diff --git a/test/issue672-upgrade-optional.sh b/test/issue672-upgrade-optional.sh
new file mode 100755
index 0000000..8c16aa6
--- /dev/null
+++ b/test/issue672-upgrade-optional.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+cd ${CURR_DIR}/issue672-upgrade-optional
+rm -rf b/.dub
+echo "{\"fileVersion\": 1,\"versions\": {\"dub\": \"1.0.0\"}}" > dub.selections.json
+${DUB} upgrade || exit 1
+
+if ! grep -c -e "\"dub\": \"1.1.0\"" dub.selections.json; then
+	echo "Dependency not upgraded."
+	exit 1
+fi
diff --git a/test/issue672-upgrade-optional/.no_build b/test/issue672-upgrade-optional/.no_build
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/issue672-upgrade-optional/.no_build
diff --git a/test/issue672-upgrade-optional/dub.sdl b/test/issue672-upgrade-optional/dub.sdl
new file mode 100644
index 0000000..9b142c3
--- /dev/null
+++ b/test/issue672-upgrade-optional/dub.sdl
@@ -0,0 +1,2 @@
+name "b"
+dependency "dub" version=">=1.0.0 <=1.1.0" optional=true
diff --git a/test/issue672-upgrade-optional/dub.selections.json b/test/issue672-upgrade-optional/dub.selections.json
new file mode 100644
index 0000000..44b07d4
--- /dev/null
+++ b/test/issue672-upgrade-optional/dub.selections.json
@@ -0,0 +1,6 @@
+{
+	"fileVersion": 1,
+	"versions": {
+		"dub": "1.0.0"
+	}
+}