diff --git a/extras/tests/MixedConfiguration/use_double_0.cpp b/extras/tests/MixedConfiguration/use_double_0.cpp
index 8752890d..6958bc06 100644
--- a/extras/tests/MixedConfiguration/use_double_0.cpp
+++ b/extras/tests/MixedConfiguration/use_double_0.cpp
@@ -3,15 +3,65 @@
 
 #include <catch.hpp>
 
-TEST_CASE("ARDUINOJSON_USE_DOUBLE == 0") {
-  JsonDocument doc;
-  JsonObject root = doc.to<JsonObject>();
+namespace my {
+using ArduinoJson::detail::isinf;
+}  // namespace my
 
-  root["pi"] = 3.14;
-  root["e"] = 2.72;
-
-  std::string json;
-  serializeJson(doc, json);
-
-  REQUIRE(json == "{\"pi\":3.14,\"e\":2.72}");
+void checkFloat(const char* input, float expected) {
+  using ArduinoJson::detail::NumberType;
+  using ArduinoJson::detail::parseNumber;
+  CAPTURE(input);
+  auto result = parseNumber(input);
+  REQUIRE(result.type() == NumberType::Float);
+  REQUIRE(result.asFloat() == Approx(expected));
+}
+
+TEST_CASE("ARDUINOJSON_USE_DOUBLE == 0") {
+  SECTION("serializeJson()") {
+    JsonDocument doc;
+    JsonObject root = doc.to<JsonObject>();
+
+    root["pi"] = 3.14;
+    root["e"] = 2.72;
+
+    std::string json;
+    serializeJson(doc, json);
+
+    REQUIRE(json == "{\"pi\":3.14,\"e\":2.72}");
+  }
+
+  SECTION("parseNumber()") {
+    using ArduinoJson::detail::NumberType;
+    using ArduinoJson::detail::parseNumber;
+
+    SECTION("Large positive number") {
+      auto result = parseNumber("1e300");
+      REQUIRE(result.type() == NumberType::Float);
+      REQUIRE(result.asFloat() > 0);
+      REQUIRE(my::isinf(result.asFloat()));
+    }
+
+    SECTION("Large negative number") {
+      auto result = parseNumber("-1e300");
+      REQUIRE(result.type() == NumberType::Float);
+      REQUIRE(result.asFloat() < 0);
+      REQUIRE(my::isinf(result.asFloat()));
+    }
+
+    SECTION("Too small to be represented") {
+      auto result = parseNumber("1e-300");
+      REQUIRE(result.type() == NumberType::Float);
+      REQUIRE(result.asFloat() == 0);
+    }
+
+    SECTION("MantissaTooLongToFit") {
+      checkFloat("0.340282346638528861111111111111", 0.34028234663852886f);
+      checkFloat("34028234663852886.11111111111111", 34028234663852886.0f);
+      checkFloat("34028234.66385288611111111111111", 34028234.663852886f);
+
+      checkFloat("-0.340282346638528861111111111111", -0.34028234663852886f);
+      checkFloat("-34028234663852886.11111111111111", -34028234663852886.0f);
+      checkFloat("-34028234.66385288611111111111111", -34028234.663852886f);
+    }
+  }
 }
diff --git a/extras/tests/Numbers/parseFloat.cpp b/extras/tests/Numbers/parseFloat.cpp
index 4a42f442..928e0767 100644
--- a/extras/tests/Numbers/parseFloat.cpp
+++ b/extras/tests/Numbers/parseFloat.cpp
@@ -2,7 +2,6 @@
 // Copyright © 2014-2024, Benoit BLANCHON
 // MIT License
 
-#define ARDUINOJSON_USE_DOUBLE 0
 #define ARDUINOJSON_ENABLE_NAN 1
 #define ARDUINOJSON_ENABLE_INFINITY 1
 
@@ -13,7 +12,9 @@ using namespace ArduinoJson::detail;
 
 void checkFloat(const char* input, float expected) {
   CAPTURE(input);
-  REQUIRE(parseNumber<float>(input) == Approx(expected));
+  auto result = parseNumber(input);
+  REQUIRE(result.type() == NumberType::Float);
+  REQUIRE(result.asFloat() == Approx(expected));
 }
 
 void checkFloatNaN(const char* input) {
@@ -65,23 +66,6 @@ TEST_CASE("parseNumber<float>()") {
         1e+32f);
   }
 
-  SECTION("MantissaTooLongToFit") {
-    checkFloat("0.340282346638528861111111111111", 0.34028234663852886f);
-    checkFloat("34028234663852886.11111111111111", 34028234663852886.0f);
-    checkFloat("34028234.66385288611111111111111", 34028234.663852886f);
-
-    checkFloat("-0.340282346638528861111111111111", -0.34028234663852886f);
-    checkFloat("-34028234663852886.11111111111111", -34028234663852886.0f);
-    checkFloat("-34028234.66385288611111111111111", -34028234.663852886f);
-  }
-
-  SECTION("ExponentTooBig") {
-    checkFloatInf("1e39", false);
-    checkFloatInf("-1e39", true);
-    checkFloatInf("1e255", false);
-    checkFloat("1e-255", 0.0f);
-  }
-
   SECTION("NaN") {
     checkFloatNaN("NaN");
     checkFloatNaN("nan");
@@ -94,8 +78,5 @@ TEST_CASE("parseNumber<float>()") {
     checkFloatInf("inf", false);
     checkFloatInf("+inf", false);
     checkFloatInf("-inf", true);
-
-    checkFloatInf("1e300", false);
-    checkFloatInf("-1e300", true);
   }
 }