diff --git a/.forgejo/workflows/pr_check.yaml b/.forgejo/workflows/pr_check.yaml
index b8f8f80..cd9c23a 100644
--- a/.forgejo/workflows/pr_check.yaml
+++ b/.forgejo/workflows/pr_check.yaml
@@ -134,6 +134,8 @@ jobs:
             -GNinja -DCMAKE_BUILD_TYPE=Release   \
             -DENABLE_EXAMPLES=ON                 \
             -DENABLE_TESTS=ON                    \
+            -DMAX_LOG_LEVEL=0                    \
+            -DTEST_MAX_LOG_LEVEL=0               \
             -DCMAKE_CXX_FLAGS="-ftemplate-backtrace-limit=0"
           cmake --build ${{ github.workspace }}/build_gcc --parallel `nproc`
 
@@ -160,6 +162,8 @@ jobs:
             -GNinja -DCMAKE_BUILD_TYPE=Release     \
             -DENABLE_EXAMPLES=ON                   \
             -DENABLE_TESTS=ON                      \
+            -DMAX_LOG_LEVEL=0                      \
+            -DTEST_MAX_LOG_LEVEL=0                 \
             -DCMAKE_CXX_FLAGS="-stdlib=libc++ -I/home/LLVM-${LLVM_VER}/include/c++/v1 -fno-modules"
 
           echo "::group::compile_commands.json content"
diff --git a/.vscode/launch.json b/.vscode/launch.json
index fa2cb78..6f11203 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -9,7 +9,10 @@
             "request": "launch",
             "name": "Debug: connect",
             "program": "${workspaceFolder}/build/examples/output/connect",
-            "args": [],
+            "args": [
+                "--log_level=0"
+                // --gtest_filter=POSTIVE_PATTERNS[-NEGATIVE_PATTERNS]
+            ],
             "cwd": "${workspaceFolder}",
             "preLaunchTask": "GCC: Build"
         },
@@ -19,6 +22,7 @@
             "name": "Debug: tests",
             "program": "${workspaceFolder}/build/larra_xmpp_tests",
             "args": [
+                "--log_level=0"
                 // --gtest_filter=POSTIVE_PATTERNS[-NEGATIVE_PATTERNS]
                 // "--gtest_filter=Roster*"
             ],
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 4720fa7..99fb723 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -79,8 +79,8 @@
             "command": [
                 "cd ${workspaceFolder} &&",
                 "mkdir -p build && cd build &&",
-                "cmake cmake -Wno-dev ",
-                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON .."
+                "cmake -Wno-dev ",
+                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON -DMAX_LOG_LEVEL=0 -DTEST_MAX_LOG_LEVEL=0 .."
             ],
             "options": {
                 "env": {
@@ -138,6 +138,7 @@
                 "mkdir -p build_clang && cd build_clang &&",
                 "cmake -Wno-dev ",
                 "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON ",
+                "   -DMAX_LOG_LEVEL=0 -DTEST_MAX_LOG_LEVEL=0",
                 "   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++\"",
                 "   -DCMAKE_EXE_LINKER_FLAGS=\"-L/usr/lib/x86_64-linux-gnu -lstdc++\" .."
             ],
@@ -160,6 +161,7 @@
                 "mkdir -p build_clang && cd build_clang &&",
                 "cmake -Wno-dev ",
                 "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON",
+                "   -DMAX_LOG_LEVEL=0 -DTEST_MAX_LOG_LEVEL=0",
                 //
                 // Uncomment for GCC standart library: libstdc++
                 //"   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++ -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr\"",
@@ -211,6 +213,7 @@
                 "mkdir -p build_clang && cd build_clang &&",
                 "cmake -Wno-dev ",
                 "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON ",
+                "   -DMAX_LOG_LEVEL=0 -DTEST_MAX_LOG_LEVEL=0",
                 "   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++ -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -fsanitize=memory\"",
                 "   -DCMAKE_EXE_LINKER_FLAGS=\"-L/usr/lib/x86_64-linux-gnu -lstdc++ -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -fsanitize=memory\" ..",
             ],
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ed51f5..389da96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,8 @@ set(BOOST_INCLUDE_LIBRARIES "pfr;asio;serialization")
 option(CPM_USE_LOCAL_PACKAGES "Use local packages" ON)
 option(UTEMPL_USE_LOCAL_PACKAGE "Use utempl local package" OFF)
 option(BUILD_EXECUTABLE ON)
-option(LOG_LEVEL 0 "Available log levels: 0=TRACE, 1=DEBUG,2= INFO,3= WARN, 4=ERROR, 5=CRITICAL, 6=OFF") # Compile program with highest available log levle to trace everything
+set(MAX_LOG_LEVEL 2 CACHE STRING "Available log levels: 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=CRITICAL, 6=OFF")
+set(TEST_MAX_LOG_LEVEL 2 CACHE STRING "Available log levels: 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=CRITICAL, 6=OFF")
 set(UTEMPL_URL
   "https://sha512sum.xyz/git/sha512sum/utempl"
   CACHE STRING "utempl repository URL")
@@ -260,7 +261,7 @@ if(ENABLE_TESTS)
   target_sources(larra_xmpp_tests PUBLIC ${SOURCES})
   target_link_libraries(larra_xmpp_tests GTest::gtest_main
     larra_xmpp)
-  target_compile_definitions(larra_xmpp_tests PRIVATE SPDLOG_ACTIVE_LEVEL=0) # SPDLOG_LEVEL_TRACE=0. Check LOG_LEVEL variable and spdlog documentation for more details
+  target_compile_definitions(larra_xmpp_tests PRIVATE SPDLOG_ACTIVE_LEVEL=${TEST_MAX_LOG_LEVEL})
   set_property(TARGET larra_xmpp_tests PROPERTY CXX_STANDARD 23)
   include(GoogleTest)
   gtest_discover_tests(larra_xmpp_tests)
@@ -272,7 +273,7 @@ if(ENABLE_EXAMPLES)
       get_filename_component(EXAMPLE_NAME ${EXAMPLE_SRC} NAME_WE)
       add_executable(${EXAMPLE_NAME} ${EXAMPLE_SRC})
       target_link_libraries(${EXAMPLE_NAME} larra_xmpp)
-      target_compile_definitions(${EXAMPLE_NAME} PRIVATE SPDLOG_ACTIVE_LEVEL=${LOG_LEVEL})
+      target_compile_definitions(${EXAMPLE_NAME} PRIVATE SPDLOG_ACTIVE_LEVEL=${TEST_MAX_LOG_LEVEL})
       set_property(TARGET ${EXAMPLE_NAME} PROPERTY CXX_STANDARD 23)
       set_target_properties(${EXAMPLE_NAME} PROPERTIES
         RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/examples/output")
diff --git a/tests/iq.cpp b/tests/iq.cpp
index 4638ffe..3545e51 100644
--- a/tests/iq.cpp
+++ b/tests/iq.cpp
@@ -1,10 +1,23 @@
 #include <gtest/gtest.h>
+#include <spdlog/spdlog.h>
 
 #include <larra/iq.hpp>
+#include <stdexcept>
 
 namespace {
 
-static constexpr auto kExpectedData = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<iq id=\"id\" type=\"get\"><some>37</some></iq>\n";
+static constexpr auto kForbiddenErrorData = R"(<?xml version="1.0" encoding="UTF-8"?>
+<iq id="42" to="name@server/res" type="error"><error type="auth"><forbidden xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/></error>
+</iq>)";
+
+static constexpr auto kExpectedSetData = R"(<?xml version="1.0" encoding="UTF-8"?>
+<iq id="id" type="set"><some>37</some></iq>
+)";
+
+static constexpr auto kExpectedData = R"(<?xml version="1.0" encoding="UTF-8"?>
+<iq id="id" type="get"><some>37</some></iq>
+)";
+
 struct SomeStruct {
   int value;
   constexpr auto operator==(const SomeStruct&) const -> bool = default;
@@ -43,4 +56,101 @@ TEST(IQ, Parse) {
   EXPECT_EQ(S::Parse(node), iq);
 }
 
+TEST(IQ, ParseForbiddenError) {
+  std::istringstream xml_stream(kForbiddenErrorData);
+
+  xmlpp::DomParser parser;
+  parser.parse_stream(xml_stream);
+
+  using S = Serialization<Iq<SomeStruct>>;
+  xmlpp::Document* doc = parser.get_document();
+  auto iqRes = S::Parse(doc->get_root_node());
+
+  ASSERT_TRUE(std::holds_alternative<IqError>(iqRes));
+
+  auto errorRes = std::get<IqError>(iqRes);
+  ASSERT_TRUE(std::holds_alternative<stanza::error::Forbidden>(errorRes.payload));
+}
+
+TEST(IQ, IqErrThrowVisitorThrow) {
+  std::istringstream xml_stream(kForbiddenErrorData);
+
+  xmlpp::DomParser parser;
+  parser.parse_stream(xml_stream);
+
+  using S = Serialization<Iq<SomeStruct>>;
+  xmlpp::Document* doc = parser.get_document();
+  auto iqRes = S::Parse(doc->get_root_node());
+  ASSERT_TRUE(std::holds_alternative<IqError>(iqRes));
+
+  static constexpr auto visitorErrMsg = "Test Error";
+  static constexpr auto throwErrMsg = "Stanza IQ Error: Forbidden";
+  try {
+    std::visit(utempl::Overloaded([](iq::Result<SomeStruct> r) {}, IqErrThrowVisitor{visitorErrMsg}), std::move(iqRes));
+  } catch(const stanza::error::StanzaBaseError& err) {
+    ASSERT_STREQ(throwErrMsg, err.what());
+    return;
+  } catch(const std::runtime_error& err) {
+    ASSERT_TRUE(false) << "Invalid throw type throw";
+  } catch(...) {
+    ASSERT_TRUE(false) << "Unexpected throw";
+  }
+
+  ASSERT_TRUE(false) << "Expected throwing an exception due to an error in output";
+}
+
+TEST(IQ, IqErrThrowVisitorThrowGet) {
+  std::istringstream xml_stream(kExpectedData);
+
+  xmlpp::DomParser parser;
+  parser.parse_stream(xml_stream);
+
+  using S = Serialization<Iq<SomeStruct>>;
+  xmlpp::Document* doc = parser.get_document();
+  auto iqRes = S::Parse(doc->get_root_node());
+  ASSERT_TRUE(std::holds_alternative<iq::Get<SomeStruct>>(iqRes)) << "\tERROR: Unexpected parse result";
+
+  static constexpr auto visitorErrMsg = "Test Error";
+  static constexpr auto throwErrMsg = "Test Error: 'Get' is an invalid type for IQ result. Expected 'Result' or 'Error'";
+  try {
+    std::visit(utempl::Overloaded([](iq::Result<SomeStruct> r) {}, IqErrThrowVisitor{"Test Error"}), std::move(iqRes));
+  } catch(const stanza::error::StanzaBaseError& err) {
+    ASSERT_TRUE(false) << "\tERROR: Invalid throw type throw";
+  } catch(const std::runtime_error& err) {
+    ASSERT_STREQ(throwErrMsg, err.what());
+    return;
+  } catch(...) {
+    ASSERT_TRUE(false) << "\tERROR: Unexpected throw";
+  }
+
+  ASSERT_TRUE(false) << "\tERROR: Expected throwing an exception due to an error in output";
+}
+
+TEST(IQ, IqErrThrowVisitorThrowSet) {
+  std::istringstream xml_stream(kExpectedSetData);
+
+  xmlpp::DomParser parser;
+  parser.parse_stream(xml_stream);
+
+  using S = Serialization<Iq<SomeStruct>>;
+  xmlpp::Document* doc = parser.get_document();
+  auto iqRes = S::Parse(doc->get_root_node());
+  ASSERT_TRUE(std::holds_alternative<iq::Set<SomeStruct>>(iqRes)) << "\tERROR: Unexpected parse result";
+
+  static constexpr auto visitorErrMsg = "Test Error";
+  static constexpr auto throwErrMsg = "Test Error: 'Set' is an invalid type for IQ result. Expected 'Result' or 'Error'";
+  try {
+    std::visit(utempl::Overloaded([](iq::Result<SomeStruct> r) {}, IqErrThrowVisitor{"Test Error"}), std::move(iqRes));
+  } catch(const stanza::error::StanzaBaseError& err) {
+    ASSERT_TRUE(false) << "\tERROR: Invalid throw type throw";
+  } catch(const std::runtime_error& err) {
+    ASSERT_STREQ(throwErrMsg, err.what());
+    return;
+  } catch(...) {
+    ASSERT_TRUE(false) << "\tERROR: Unexpected throw";
+  }
+
+  ASSERT_TRUE(false) << "\tERROR: Expected throwing an exception due to an error in output";
+}
+
 }  // namespace larra::xmpp