diff --git a/changes/2606.misc.rst b/changes/2606.misc.rst
new file mode 100644
index 0000000000..9478dac6a4
--- /dev/null
+++ b/changes/2606.misc.rst
@@ -0,0 +1 @@
+The testbed project was updated to use PEP621 format for the license field.
diff --git a/testbed/pyproject.toml b/testbed/pyproject.toml
index e5729ce8c5..89c2f190f9 100644
--- a/testbed/pyproject.toml
+++ b/testbed/pyproject.toml
@@ -4,7 +4,7 @@ project_name = "Toga Testbed"
 bundle = "org.beeware.toga"
 version = "0.0.1"
 url = "https://beeware.org"
-license = "BSD license"
+license.file = "LICENSE"
 author = "Tiberius Yak"
 author_email = "tiberius@beeware.org"