diff --git a/api/Print.h b/api/Print.h
index a2b982da..fc30b45b 100644
--- a/api/Print.h
+++ b/api/Print.h
@@ -93,4 +93,4 @@ class Print
 };
 
 }
-using namespace arduino;
\ No newline at end of file
+using arduino::Print;
\ No newline at end of file
diff --git a/api/String.h b/api/String.h
index a3d0d9e8..3f34493b 100644
--- a/api/String.h
+++ b/api/String.h
@@ -255,5 +255,8 @@ class StringSumHelper : public String
 
 } // namespace arduino
 
+using arduino::__FlashStringHelper;
+using arduino::String;
+
 #endif  // __cplusplus
 #endif  // __ARDUINO_STRINGS__
diff --git a/api/Udp.h b/api/Udp.h
index 53f89f9a..68a71e85 100644
--- a/api/Udp.h
+++ b/api/Udp.h
@@ -87,6 +87,4 @@ class UDP : public Stream {
   uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); };
 };
 
-}
-
-using namespace arduino;
+}
\ No newline at end of file
diff --git a/test/src/Stream/test_parseFloat.cpp b/test/src/Stream/test_parseFloat.cpp
index 19d2ce86..a9fba616 100644
--- a/test/src/Stream/test_parseFloat.cpp
+++ b/test/src/Stream/test_parseFloat.cpp
@@ -12,6 +12,8 @@
 
 #include <float.h>
 
+using namespace arduino;
+
 /**************************************************************************************
  * TEST CODE
  **************************************************************************************/
diff --git a/test/src/Stream/test_parseInt.cpp b/test/src/Stream/test_parseInt.cpp
index b5b60610..c79ed447 100644
--- a/test/src/Stream/test_parseInt.cpp
+++ b/test/src/Stream/test_parseInt.cpp
@@ -14,6 +14,8 @@
  * TEST CODE
  **************************************************************************************/
 
+using namespace arduino;
+
 TEST_CASE ("Testing parseInt(LookaheadMode lookahead = SKIP_ALL, char ignore = NO_IGNORE_CHAR)", "[Stream-parseInt-01]")
 {
   StreamMock mock;