diff --git a/build.sh b/build.sh
index e5fd942bd5..fe1fd33b94 100755
--- a/build.sh
+++ b/build.sh
@@ -93,7 +93,7 @@ fi
 cd ${BUILD_DIR}
 
 use_pika_tools=""
-if [ $1 = "tools" ]; then
+if [[ $1 = "tools" ]]; then
   use_pika_tools="-DUSE_PIKA_TOOLS=ON"
 fi
 
diff --git a/include/pika_list.h b/include/pika_list.h
index b6c1378d00..a98de285cb 100644
--- a/include/pika_list.h
+++ b/include/pika_list.h
@@ -98,12 +98,12 @@ class BlockingBaseCmd : public Cmd {
 class BLPopCmd final : public BlockingBaseCmd {
  public:
   BLPopCmd(const std::string& name, int arity, uint16_t flag) : BlockingBaseCmd(name, arity, flag){};
-  virtual std::vector<std::string> current_key() const {
+  virtual std::vector<std::string> current_key() const override {
     return { keys_ };
   }
-  virtual void Do(std::shared_ptr<Slot> slot = nullptr);
-  virtual void Split(std::shared_ptr<Slot> slot, const HintKeys& hint_keys){};
-  virtual void Merge(){};
+  virtual void Do(std::shared_ptr<Slot> slot = nullptr) override;
+  virtual void Split(std::shared_ptr<Slot> slot, const HintKeys& hint_keys) override {};
+  virtual void Merge() override {};
   virtual Cmd* Clone() override { return new BLPopCmd(*this); }
   void DoInitial() override;
   void DoBinlog(const std::shared_ptr<SyncMasterSlot>& slot) override;
@@ -257,12 +257,12 @@ class LTrimCmd : public Cmd {
 class BRPopCmd final : public BlockingBaseCmd {
  public:
   BRPopCmd(const std::string& name, int arity, uint16_t flag) : BlockingBaseCmd(name, arity, flag){};
-  virtual std::vector<std::string> current_key() const {
+  virtual std::vector<std::string> current_key() const override {
     return { keys_ };
   }
-  virtual void Do(std::shared_ptr<Slot> slot = nullptr);
-  virtual void Split(std::shared_ptr<Slot> slot, const HintKeys& hint_keys){};
-  virtual void Merge(){};
+  virtual void Do(std::shared_ptr<Slot> slot = nullptr) override;
+  virtual void Split(std::shared_ptr<Slot> slot, const HintKeys& hint_keys) override {};
+  virtual void Merge() override {};
   virtual Cmd* Clone() override { return new BRPopCmd(*this); }
   void DoInitial() override;
   void DoBinlog(const std::shared_ptr<SyncMasterSlot>& slot) override;