diff --git a/justfile b/justfile
index 28389a7..bbe4f6d 100644
--- a/justfile
+++ b/justfile
@@ -36,7 +36,10 @@ environment-contract:
 # Offline: validate the vendored upstream Grafana dashboard and its parser.
 dashboard-test:
     python3 tools/adapt_dashboard.py --check
-    python3 -m unittest tests/test_dashboard_contract.py
+    # Run the file, not `-m unittest <path>`: that form resolves the path to a
+    # module name, and tests/ is not a package, so whether it imports depends on
+    # the python version. 3.14 accepts it, the gate host's 3.10 does not.
+    python3 tests/test_dashboard_contract.py
 
 # METRICS may be a saved scrape, localhost URL, or '-' for stdin.
 dashboard-contract METRICS:
@@ -460,12 +463,13 @@ backfill-batch-contract:
 
 differential-oracle:
     zig build -Doptimize=ReleaseSafe
-    python3 tests/differential_oracle.py
+    STREAM_UPSTREAM_REPO='{{upstream}}' python3 tests/differential_oracle.py
 
 # Five seed-derived upstream predicate kills against real Stream children.
 differential-oracle-multiseed:
     zig build -Doptimize=ReleaseSafe
     JETSTREAM_ORACLE_SEED=7001 \
+      STREAM_UPSTREAM_REPO='{{upstream}}' \
       STREAM_ORACLE_RUN='^TestStreamRestartPredicateKillOracle$' \
       python3 tests/differential_oracle.py