diff --git a/Core/include/Acts/Utilities/RangeXD.hpp b/Core/include/Acts/Utilities/RangeXD.hpp
index b93970b291a..bb7c130c9c4 100644
--- a/Core/include/Acts/Utilities/RangeXD.hpp
+++ b/Core/include/Acts/Utilities/RangeXD.hpp
@@ -645,8 +645,8 @@ void to_json(nlohmann::json& j, const Range1D<Type>& r) {
 
 template <typename Type>
 void from_json(const nlohmann::json& j, Range1D<Type>& r) {
-  r.setMin(static_cast<Type>(j["min"]));
-  r.setMax(static_cast<Type>(j["max"]));
+  r.setMin(j.at("min").template get<Type>());
+  r.setMax(j.at("max").template get<Type>());
 }
 
 }  // namespace Acts
diff --git a/Core/src/Geometry/Extent.cpp b/Core/src/Geometry/Extent.cpp
index 4a940d924ec..8a9094401c9 100644
--- a/Core/src/Geometry/Extent.cpp
+++ b/Core/src/Geometry/Extent.cpp
@@ -240,15 +240,15 @@ void Acts::to_json(nlohmann::json& j, const Acts::Extent& e) {
 }
 
 void Acts::from_json(const nlohmann::json& j, Acts::Extent& e) {
-  const auto& jrange = j["range"];
+  const auto& jrange = j.at("range");
 
   for (const auto& [key, value] : jrange.items()) {
     BinningValue bval = binningValueFromName(key);
-    e.set(bval, value["min"], value["max"]);
+    e.set(bval, value.at("min"), value.at("max"));
   }
 
   if (j.contains("envelope")) {
-    const auto& jenvelope = j["envelope"];
+    const auto& jenvelope = j.at("envelope");
     ExtentEnvelope envelope;
 
     for (const auto& [key, value] : jenvelope.items()) {
diff --git a/Plugins/Json/src/MaterialJsonConverter.cpp b/Plugins/Json/src/MaterialJsonConverter.cpp
index 5a40b9f7a53..e00a8ccd9ac 100644
--- a/Plugins/Json/src/MaterialJsonConverter.cpp
+++ b/Plugins/Json/src/MaterialJsonConverter.cpp
@@ -697,7 +697,7 @@ nlohmann::json Acts::MaterialJsonConverter::toJsonDetray(
         bUtility = std::move(nbUtility);
         swapped = true;
       } else {
-        std::runtime_error("Unsupported binning for Detray");
+        throw std::runtime_error("Unsupported binning for Detray");
       }
     } else if (bUtility.dimensions() == 2u &&
                bUtility.binningData()[0u].binvalue == BinningValue::binZ &&
diff --git a/Tests/UnitTests/Core/Utilities/BinUtilityTests.cpp b/Tests/UnitTests/Core/Utilities/BinUtilityTests.cpp
index d0282aac3de..aa6aaf21703 100644
--- a/Tests/UnitTests/Core/Utilities/BinUtilityTests.cpp
+++ b/Tests/UnitTests/Core/Utilities/BinUtilityTests.cpp
@@ -142,12 +142,12 @@ bool isEqual(const BinningData& ba, const BinningData& bb, float tolerance) {
                     (std::abs(ba.step - bb.step) < tolerance);
 
   BOOST_CHECK(equalRange);
-  bool euqalStructure =
+  bool equalStructure =
       (ba.subBinningData != nullptr)
           ? isEqual(*ba.subBinningData, *bb.subBinningData, tolerance)
           : (bb.subBinningData == nullptr);
 
-  BOOST_CHECK(euqalStructure);
+  BOOST_CHECK(equalStructure);
 
   bool equalBoundaries = (ba.boundaries().size() == bb.boundaries().size());
   if (equalBoundaries) {
@@ -161,7 +161,7 @@ bool isEqual(const BinningData& ba, const BinningData& bb, float tolerance) {
   }
   BOOST_CHECK(equalBoundaries);
 
-  return equalBool && equalRange && euqalStructure;
+  return equalBool && equalRange && equalStructure;
 }
 
 /// Check whether the BinUtility objects are equal