diff --git a/tests/15library.tests b/tests/15library.tests
index c451a05bd..612eacaa8 100644
--- a/tests/15library.tests
+++ b/tests/15library.tests
@@ -265,7 +265,7 @@ out: GenNode.+"spam".+«lib::diff::Record<lib::diff::GenNode>».Rec.ham.+eggs.+s
 out: GenNode.+_CHILD_string.+«std::string».eggs
 out: GenNode.+_CHILD_string.+«std::string».spam
 out: GenNode.+_CHILD_TimeSpan.+«lib::time::TimeSpan»
-out: GenNode.+_CHILD_long.+«long».42
+out: GenNode.+_CHILD_long.+«long.+42
 return: 0
 END
 
diff --git a/tests/library/diff/diff-tree-application-test.cpp b/tests/library/diff/diff-tree-application-test.cpp
index 2f37f39c1..4d112f26f 100644
--- a/tests/library/diff/diff-tree-application-test.cpp
+++ b/tests/library/diff/diff-tree-application-test.cpp
@@ -49,7 +49,7 @@ namespace test{
     // to act as templates within the concrete diff
     // NOTE: everything in this diff language is by-value
     const GenNode ATTRIB1("α", 1),                         // attribute α = 1 
-                  ATTRIB2("β", 2L),                        // attribute α = 2L   (int64_t)
+                  ATTRIB2("β", int64_t(2)),                // attribute α = 2L   (int64_t)
                   ATTRIB3("γ", 3.45),                      // attribute γ = 3.45 (double)
                   TYPE_X("type", "X"),                     // a "magic" type attribute "X"
                   TYPE_Y("type", "Y"),                     // 
@@ -190,7 +190,7 @@ namespace test{
             auto subScope = nested.scope();                            //       and within the nested sub-scope we find
             CHECK (  *subScope == CHILD_A);                            //           CHILD_A
             CHECK (*++subScope == MakeRec().type("Y")                  //           a yet-again nested sub-Record of type "Y"
-                                           .set("β", 2L )              //               with just an attribute "β" == 2L
+                                           .set("β", int64_t(2))       //               with just an attribute "β" == 2L
                                    .genNode(CHILD_NODE.idi.getSym())); //               (and an empty child scope)
             CHECK (*++subScope == CHILD_T);                            //           followed by another copy of CHILD_T
             CHECK (isnil (++subScope));                                //