diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..d0364c7
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,10 @@
+<constraints>
+    <hardware>
+      <physicalmemory>
+        <size unit="G">10</size>
+      </physicalmemory>
+      <disk>
+        <size unit="G">24</size>
+      </disk>
+    </hardware>
+</constraints>
diff --git a/python-tox.changes b/python-tox.changes
index 977ab73..30ac567 100644
--- a/python-tox.changes
+++ b/python-tox.changes
@@ -8,6 +8,7 @@ Fri May  5 14:30:53 UTC 2023 - Matej Cepl <mcepl@suse.com>
   access
 - Add optional_devpi_process.patch to make the package not depend
   on devpi_process (which is rather expensive to build).
+- Add _constraints.
 
 -------------------------------------------------------------------
 Fri Apr 21 12:37:47 UTC 2023 - Dirk Müller <dmueller@suse.com>