diff --git a/examples/multiprocess_c/multi.c b/examples/multiprocess_c/multi.c
index a0d0fb73..6c2ae521 100644
--- a/examples/multiprocess_c/multi.c
+++ b/examples/multiprocess_c/multi.c
@@ -97,7 +97,6 @@ int main (int argc, char **argv)
 {
     int ret;
     const char *error = NULL;
-    int i = 0;
     pid_t pid;
     int f;
 
diff --git a/src/engine/lua.cc b/src/engine/lua.cc
index 203e5c4d..0fac4f64 100644
--- a/src/engine/lua.cc
+++ b/src/engine/lua.cc
@@ -329,7 +329,6 @@ int Lua::setvar(lua_State *L) {
     std::string collection;
     std::string variableName;
     int nargs = lua_gettop(L);
-    char *chr = NULL;
     size_t pos;
     void *z(NULL);
 
diff --git a/test/cppcheck_suppressions.txt b/test/cppcheck_suppressions.txt
index ca662a85..5f59dc56 100644
--- a/test/cppcheck_suppressions.txt
+++ b/test/cppcheck_suppressions.txt
@@ -64,6 +64,7 @@ passedByValue:src/variables/global.h:110
 passedByValue:src/parser/driver.cc:45
 passedByValue:test/common/modsecurity_test.cc:49
 passedByValue:test/common/modsecurity_test.cc:98
+unreadVariable:src/rule_with_operator.cc:219
 
 uninitvar:src/operators/verify_cpf.cc:77
 uninitvar:src/operators/verify_svnr.cc:67
@@ -91,7 +92,6 @@ cstyleCast
 functionStatic
 variableScope
 shadowFunction
-unreadVariable
 
 
 // Examples
diff --git a/test/optimization/optimization.cc b/test/optimization/optimization.cc
index 081853bc..5443065b 100644
--- a/test/optimization/optimization.cc
+++ b/test/optimization/optimization.cc
@@ -83,7 +83,6 @@ int main(int argc, char **argv) {
 
         for (int i = 0; i < rules->size(); i++) {
             auto z = rules->at(i);
-            std::string key;
             if (z == NULL) {
                 continue;
             }
@@ -95,7 +94,6 @@ int main(int argc, char **argv) {
                 } else {
                     operators[op] = 1;
                 }
-                key = op;
             }
 
             if (dynamic_cast<modsecurity::RuleWithOperator *>(z.get()) != nullptr) {
@@ -107,7 +105,6 @@ int main(int argc, char **argv) {
                 } else {
                     operators[op] = 1;
                 }
-                key = op;
             }
 
         }