diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 8bd341ac..cec80cac 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -4,3 +4,14 @@ updates:
     directory: "/pyperformance/requirements"
     schedule:
       interval: "monthly"
+  # Don't update test dependencies for reproducibility.
+  # Dependabot doesn't support excluding directories
+  # (https://github.com/dependabot/dependabot-core/issues/4364)
+  # however, we can ignore all dependencies in the data-files
+  # directory which is equivalent if a bit slower
+  - package-ecosystem: "pip"
+    directories: "/pyperformance/data-files/benchmarks/**/"
+    schedule:
+      interval: "monthly"
+    ignore:
+      - dependency-name: "*"