diff --git a/src/crypto/clsag.cpp b/src/crypto/clsag.cpp
index 0b22642e..bcc369e1 100644
--- a/src/crypto/clsag.cpp
+++ b/src/crypto/clsag.cpp
@@ -9,6 +9,8 @@
 //#include "misc_log_ex.h"
 #include "../currency_core/crypto_config.h"
 
+DISABLE_GCC_AND_CLANG_WARNING(unused-function)
+
 namespace crypto
 {
   #define DBG_VAL_PRINT(x) (void(0)) // std::cout << #x ": " << x << std::endl
diff --git a/tests/core_tests/chaingen.cpp b/tests/core_tests/chaingen.cpp
index f82ed764..f100e910 100644
--- a/tests/core_tests/chaingen.cpp
+++ b/tests/core_tests/chaingen.cpp
@@ -594,6 +594,7 @@ bool test_generator::build_outputs_indext_for_chain(const blockchain_vector& blo
   return true;
 }
 //------------------------------------------------------------------
+/* not used, consider removing
 bool test_generator::get_output_details_by_global_index(const test_generator::blockchain_vector& blck_chain,
                                                         const test_generator::outputs_index& indexes,
                                                         uint64_t amount,
@@ -629,6 +630,7 @@ bool test_generator::get_output_details_by_global_index(const test_generator::bl
   output_key = boost::get<currency::txout_to_key>(boost::get<tx_out_bare>(tx->vout[tx_out_index]).target).key;
   return true;
 }
+*/
 //------------------------------------------------------------------
 
 bool test_generator::build_stake_modifier(stake_modifier_type& sm, const test_generator::blockchain_vector& blck_chain)
@@ -1068,9 +1070,7 @@ bool init_spent_output_indices(map_output_idx_t& outs, map_output_t& outs_mine,
   };
 
   for(auto& tx_pair : mtx)
-  {
-    CHECK_AND_ASSERT_MES(add_key_images_from_tx(*tx_pair.second), false, "insertion of spent key image failed for tx " << get_transaction_hash(*tx_pair.second));
-  }
+    add_key_images_from_tx(*tx_pair.second); // some key images may be added more than once (because invalid txs can't be detected here), ignore that
 
   for (auto& b : blockchain)
   {
diff --git a/tests/core_tests/chaingen.h b/tests/core_tests/chaingen.h
index 372da203..cf0ef9b0 100644
--- a/tests/core_tests/chaingen.h
+++ b/tests/core_tests/chaingen.h
@@ -444,7 +444,7 @@ public:
                   const crypto::scalar_t& blinding_masks_sum,
                   currency::block& b);
   
-  bool get_output_details_by_global_index(const test_generator::blockchain_vector& blck_chain,
+  /*bool get_output_details_by_global_index(const test_generator::blockchain_vector& blck_chain,
                                           const test_generator::outputs_index& indexes,
                                           uint64_t amount,
                                           uint64_t global_index,
@@ -452,7 +452,7 @@ public:
                                           const currency::transaction* tx,
                                           uint64_t& tx_out_index,
                                           crypto::public_key& tx_pub_key,
-                                          crypto::public_key& output_key);
+                                          crypto::public_key& output_key);*/
 
 
   
diff --git a/tests/core_tests/zarcanum_test.h b/tests/core_tests/zarcanum_test.h
index 29e96fe3..33f5ab0c 100644
--- a/tests/core_tests/zarcanum_test.h
+++ b/tests/core_tests/zarcanum_test.h
@@ -24,5 +24,6 @@ struct zarcanum_pos_block_math : public wallet_test
 {
   zarcanum_pos_block_math();
   bool generate(std::vector<test_event_entry>& events) const;
-  bool zarcanum_pos_block_math::c1(currency::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
+  bool c1(currency::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
+};
 };