diff --git a/ci_scripts/run-python-test.sh b/ci_scripts/run-python-test.sh
index e0739d007..cb2659cfa 100755
--- a/ci_scripts/run-python-test.sh
+++ b/ci_scripts/run-python-test.sh
@@ -23,10 +23,6 @@ rm -rf src/deltachat/__pycache__
 export PYTHONDONTWRITEBYTECODE=1
 
 # run python tests (tox invokes pytest to run tests in python/tests)
-# we split out qr-tests run to minimize likelyness of flaky tests
-# (some qr tests are pretty heavy in terms of send/received
-# messages and async-imap's likely has concurrency problems, 
-# eg https://github.com/async-email/async-imap/issues/4 )
 tox -e lint,py37 
 unset DCC_PY_LIVECONFIG
 
diff --git a/ci_scripts/run-rust-test.sh b/ci_scripts/run-rust-test.sh
index e0d600c5e..bbfe17ff1 100755
--- a/ci_scripts/run-rust-test.sh
+++ b/ci_scripts/run-rust-test.sh
@@ -10,8 +10,7 @@ export OPT_RELEASE="--release ${OPT}"
 export OPT_FFI_RELEASE="--manifest-path=deltachat-ffi/Cargo.toml --release"
 
 # Select cargo command: use cross by default
-# export CARGO_CMD=cross
-export CARGO_CMD=cargo
+export CARGO_CMD=cross
 
 # On Appveyor (windows) and Travis (x86_64-unknown-linux-gnu and apple) native targets we use cargo (no need to cross-compile):
 if [[ $TARGET = *"windows"* ]] || [[ $TARGET == "x86_64-unknown-linux-gnu" ]] || [[ $TARGET = *"apple"* ]]; then
@@ -19,9 +18,9 @@ if [[ $TARGET = *"windows"* ]] || [[ $TARGET == "x86_64-unknown-linux-gnu" ]] ||
 fi
 
 # Install cross if necessary:
-#if [[ $CARGO_CMD == "cross" ]]; then
-#    cargo install --git https://github.com/dignifiedquire/cross --rev fix-tty --force
-##fi
+if [[ $CARGO_CMD == "cross" ]]; then
+    cargo install --git https://github.com/dignifiedquire/cross --rev fix-tty --force
+fi
 
 # Make sure TARGET is installed when using cargo:
 if [[ $CARGO_CMD == "cargo" ]]; then
diff --git a/python/tox.ini b/python/tox.ini
index 3c7c93764..8351467eb 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -7,6 +7,9 @@ envlist =
 
 [testenv]
 commands = 
+    # (some qr tests are pretty heavy in terms of send/received
+    # messages and async-imap's likely has concurrency problems, 
+    # eg https://github.com/async-email/async-imap/issues/4 )
     pytest -n6 -v -rsXx -k "not qr" {posargs:tests} 
     pytest -n6 -v -rsXx -k "qr" {posargs:tests} 
     # python tests/package_wheels.py {toxworkdir}/wheelhouse