diff --git a/tests/Composer/Test/DependencyResolver/Fixtures/poolbuilder/partial-update-unfixing-locked-deps.test b/tests/Composer/Test/DependencyResolver/Fixtures/poolbuilder/partial-update-unfixing-locked-deps.test
new file mode 100644
index 000000000..6c160855b
--- /dev/null
+++ b/tests/Composer/Test/DependencyResolver/Fixtures/poolbuilder/partial-update-unfixing-locked-deps.test
@@ -0,0 +1,47 @@
+--TEST--
+Unlocking a package also unlocks its dependencies when transitive deps are true. But version constraints from other
+locked packages still need to be taking into account for loading all necessary versions of these transitive deps.
+
+--REQUEST--
+{
+    "require": {
+        "root/req1": "*",
+        "root/req2": "*"
+    },
+    "locked": [
+        {"name": "root/req1", "version": "1.0.0", "require": {"dep/pkg1": "1.*"}},
+        {"name": "root/req2", "version": "1.0.0", "require": {"dep/pkg2": "1.*"}},
+        {"name": "dep/pkg1", "version": "1.0.0"},
+        {"name": "dep/pkg2", "version": "1.0.0"}
+    ],
+    "allowList": [
+        "dep/pkg2"
+    ],
+    "allowTransitiveDeps": true
+}
+
+--FIXED--
+[
+]
+
+--PACKAGE-REPOS--
+[
+    [
+        {"name": "root/req1", "version": "1.0.0", "require": {"dep/pkg1": "1.*"}},
+        {"name": "root/req2", "version": "1.0.0", "require": {"dep/pkg2": "1.*"}},
+        {"name": "dep/pkg1", "version": "1.0.0"},
+        {"name": "dep/pkg1", "version": "2.0.0"},
+        {"name": "dep/pkg2", "version": "1.0.0"},
+        {"name": "dep/pkg2", "version": "1.2.0", "require": {"dep/pkg1": "2.*"}}
+    ]
+]
+
+--EXPECT--
+[
+    "root/req1-1.0.0.0 (locked)",
+    "root/req2-1.0.0.0 (locked)",
+    "dep/pkg2-1.0.0.0",
+    "dep/pkg2-1.2.0.0",
+    "dep/pkg1-1.0.0.0",
+    "dep/pkg1-2.0.0.0"
+]