diff --git a/tests/clean_system_caches.bats b/tests/clean_system_caches.bats
index a034c96..9ab37fa 100644
--- a/tests/clean_system_caches.bats
+++ b/tests/clean_system_caches.bats
@@ -177,7 +177,8 @@ EOF
     [ "$status" -eq 0 ]
     [[ "$output" == *"Next.js build cache"* ]]
     grep -q -- "-P $HOME/CustomProjects " "$find_log"
-    ! grep -q -- "-P $HOME " "$find_log"
+    run grep -q -- "-P $HOME " "$find_log"
+    [ "$status" -eq 1 ]
 
     rm -rf "$HOME/CustomProjects" "$HOME/.config/mole" "$fake_bin" "$find_log"
 }
diff --git a/tests/update.bats b/tests/update.bats
index cb5c4a3..19954eb 100644
--- a/tests/update.bats
+++ b/tests/update.bats
@@ -600,7 +600,7 @@ EOF
 @test "get_homebrew_latest_version prefers brew outdated verbose target version" {
     run bash --noprofile --norc <<'EOF'
 set -euo pipefail
-MOLE_SKIP_MAIN=1 source "$PROJECT_ROOT/mole"
+MOLE_TEST_MODE=1 MOLE_SKIP_MAIN=1 source "$PROJECT_ROOT/mole"
 
 brew() {
   if [[ "${1:-}" == "outdated" ]]; then
@@ -625,7 +625,7 @@ EOF
 @test "get_homebrew_latest_version parses brew info fallback with heading prefix" {
     run bash --noprofile --norc <<'EOF'
 set -euo pipefail
-MOLE_SKIP_MAIN=1 source "$PROJECT_ROOT/mole"
+MOLE_TEST_MODE=1 MOLE_SKIP_MAIN=1 source "$PROJECT_ROOT/mole"
 
 brew() {
   if [[ "${1:-}" == "outdated" ]]; then