diff --git a/tests/meson.build b/tests/meson.build
index 668665b9..d0dbdb69 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -171,10 +171,22 @@ endif
 
 # OIDC test
 if oidc_enabled
+  # gen_oidc_test_data must run before test-oidc to generate data/oidc.json and
+  # the token files consumed by the test.  Use priority so meson schedules it
+  # first (higher priority runs first).
+  test('gen_oidc_test_data', gen_oidc_exe,
+    env:          test_env,
+    timeout:      30,
+    workdir:      test_workdir,
+    priority:     1,
+    is_parallel:  false,
+  )
   test('test-oidc', find_program('test-oidc'),
-    env:     test_env,
-    timeout: 180,
-    workdir: test_workdir,
+    env:          test_env,
+    timeout:      180,
+    workdir:      test_workdir,
+    priority:     0,
+    is_parallel:  false,
   )
 endif