diff --git a/include/internal/TestCPPTestCase.h b/include/internal/TestCPPTestCase.h
index d0335b2..da4698b 100644
--- a/include/internal/TestCPPTestCase.h
+++ b/include/internal/TestCPPTestCase.h
@@ -196,7 +196,7 @@ namespace TestCPP {
          * This can be used for checking sections of output based on
          *  test configuration.
          */
-        void clearStdoutCapture ();
+        static void clearStdoutCapture ();
 
         /**
          * @brief Clears the captured output from std::clog.
@@ -204,7 +204,7 @@ namespace TestCPP {
          * This can be used for checking sections of output based on
          *  test configuration.
          */
-        void clearLogCapture ();
+        static void clearLogCapture ();
 
         /**
          * @brief Clears the captured output from stderr.
@@ -212,7 +212,7 @@ namespace TestCPP {
          * This can be used for checking sections of output based on
          *  test configuration.
          */
-        void clearStderrCapture ();
+        static void clearStderrCapture ();
 
         /**
          * @brief Check the argument against what is captured from
diff --git a/include/internal/TestCPPTestSuite.h b/include/internal/TestCPPTestSuite.h
index 9d9e83e..57780d2 100644
--- a/include/internal/TestCPPTestSuite.h
+++ b/include/internal/TestCPPTestSuite.h
@@ -109,7 +109,7 @@ namespace TestCPP {
          */
         template<typename... OtherTests>
         typename enable_if<sizeof...(OtherTests) == 0>::type
-        inline addTests () { }
+        static inline addTests () { }
 
         /**
          * @brief Add one or more tests at once to the test suite.