diff --git a/constraints.txt b/constraints.txt
new file mode 100644
index 0000000000..cd066084df
--- /dev/null
+++ b/constraints.txt
@@ -0,0 +1,4 @@
+# Numpy 1.25 deprecated some behaviours that we used, and caused some
+# tests to flake. See https://github.com/Qiskit/qiskit-terra/issues/10305,
+# remove pin when resolving that.
+numpy<1.25
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
index 6839e04a93..e8b550604d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ isolated_build = true
 
 [testenv]
 usedevelop = True
-install_command = pip install -U {opts} {packages}
+install_command = pip install -c{toxinidir}/constraints.txt -U {opts} {packages}
 setenv =
   VIRTUAL_ENV={envdir}
   QISKIT_SUPPRESS_PACKAGING_WARNINGS=Y