diff --git a/tests/functional/test_install_requested.py b/tests/functional/test_install_requested.py
index 0b5d5f18e..116933c10 100644
--- a/tests/functional/test_install_requested.py
+++ b/tests/functional/test_install_requested.py
@@ -110,3 +110,40 @@ def test_install_requested_in_reqs_and_constraints(
     _assert_requested_present(script, result, "require_simple", "1.0")
     # simple must have REQUESTED because it is in requirements.txt
     _assert_requested_present(script, result, "simple", "2.0")
+
+
+@pytest.mark.usefixtures("with_wheel")
+def test_install_requested_from_cli_with_constraint(
+    script: PipTestEnvironment, data: TestData
+) -> None:
+    script.scratch_path.joinpath("constraints.txt").write_text("simple<3\n")
+    result = script.pip(
+        "install",
+        "--no-index",
+        "-f",
+        data.find_links,
+        "-c",
+        script.scratch_path / "constraints.txt",
+        "simple",
+    )
+    # simple must have REQUESTED because it was provided on the command line
+    _assert_requested_present(script, result, "simple", "2.0")
+
+
+@pytest.mark.usefixtures("with_wheel")
+@pytest.mark.network
+def test_install_requested_from_cli_with_url_constraint(
+    script: PipTestEnvironment, data: TestData
+) -> None:
+    script.scratch_path.joinpath("constraints.txt").write_text(
+        "pip-test-package @ git+https://github.com/pypa/pip-test-package@0.1.1\n"
+    )
+    result = script.pip(
+        "install",
+        "--no-index",
+        "-c",
+        script.scratch_path / "constraints.txt",
+        "pip-test-package",
+    )
+    # pip-test-package must have REQUESTED because it was provided on the command line
+    _assert_requested_present(script, result, "pip_test_package", "0.1.1")