diff --git a/src/rest.cpp b/src/rest.cpp
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -516,7 +516,7 @@
                     oss >> fCheckMemPool;
                     oss >> vOutPoints;
                 }
-            } catch (const std::ios_base::failure &e) {
+            } catch (const std::ios_base::failure &) {
                 // abort in case of unreadable binary data
                 return RESTERR(req, HTTP_BAD_REQUEST, "Parse error");
             }
diff --git a/src/test/coins_tests.cpp b/src/test/coins_tests.cpp
--- a/src/test/coins_tests.cpp
+++ b/src/test/coins_tests.cpp
@@ -546,7 +546,7 @@
         Coin c4;
         ss4 >> c4;
         BOOST_CHECK_MESSAGE(false, "We should have thrown");
-    } catch (const std::ios_base::failure &e) {
+    } catch (const std::ios_base::failure &) {
     }
 
     // Very large scriptPubKey (3*10^9 bytes) past the end of the stream
@@ -559,7 +559,7 @@
         Coin c5;
         ss5 >> c5;
         BOOST_CHECK_MESSAGE(false, "We should have thrown");
-    } catch (const std::ios_base::failure &e) {
+    } catch (const std::ios_base::failure &) {
     }
 }
 
@@ -760,7 +760,7 @@
                            coinbase);
         test.cache.SelfTest();
         GetCoinMapEntry(test.cache.map(), result_value, result_flags);
-    } catch (std::logic_error &e) {
+    } catch (std::logic_error &) {
         result_value = FAIL;
         result_flags = NO_ENTRY;
     }
@@ -821,7 +821,7 @@
         WriteCoinViewEntry(test.cache, child_value, child_flags);
         test.cache.SelfTest();
         GetCoinMapEntry(test.cache.map(), result_value, result_flags);
-    } catch (std::logic_error &e) {
+    } catch (std::logic_error &) {
         result_value = FAIL;
         result_flags = NO_ENTRY;
     }
diff --git a/src/test/dbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
--- a/src/test/dbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -278,7 +278,7 @@
                 try {
                     READWRITE(c);
                     str.push_back(c);
-                } catch (const std::ios_base::failure &e) {
+                } catch (const std::ios_base::failure &) {
                     break;
                 }
             }
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -122,7 +122,7 @@
         uint8_t pchMsgTmp[4];
         ssPeers1 >> pchMsgTmp;
         ssPeers1 >> addrman1;
-    } catch (const std::exception &e) {
+    } catch (const std::exception &) {
         exceptionThrown = true;
     }
 
@@ -154,7 +154,7 @@
         uint8_t pchMsgTmp[4];
         ssPeers1 >> pchMsgTmp;
         ssPeers1 >> addrman1;
-    } catch (const std::exception &e) {
+    } catch (const std::exception &) {
         exceptionThrown = true;
     }
     // Even through de-serialization failed addrman is not left in a clean