diff --git a/meta/tests/pp/foldl.c++ b/meta/tests/pp/foldl.c++
index b971b9d3..8d26dfa5 100644
--- a/meta/tests/pp/foldl.c++
+++ b/meta/tests/pp/foldl.c++
@@ -5,3 +5,6 @@
 using namespace std::string_view_literals;
 
 static_assert(AW_TO_STR(AW_FOLD_LEFT(AW_IDENTITY, AW_TO_STR, a, b, c)) == R"("a", "b", "c")"sv);
+
+#define SHOW_ASSOC( a, b ) (a b)
+static_assert(AW_TO_STR(AW_FOLDL(SHOW_ASSOC,  1, 2, 3, 4, 5, 6, 7)) == "((((((1 2) 3) 4) 5) 6) 7)"sv);
diff --git a/meta/tests/pp/foldr.c++ b/meta/tests/pp/foldr.c++
index 6b775864..05c7fc48 100644
--- a/meta/tests/pp/foldr.c++
+++ b/meta/tests/pp/foldr.c++
@@ -6,3 +6,6 @@ using namespace std::string_view_literals;
 
 static_assert(AW_TO_STR(AW_FOLD_RIGHT(AW_IDENTITY, AW_TO_STR, a, b, c)) == R"("a", "b", "c")"sv);
 static_assert(AW_TO_STR(AW_FOREACH(AW_TO_STR, a, b, c)) == R"("a", "b", "c")"sv);
+
+#define SHOW_ASSOC( a, b ) (a b)
+static_assert(AW_TO_STR(AW_FOLDR(SHOW_ASSOC,  1, 2, 3, 4, 5, 6, 7)) == "(1 (2 (3 (4 (5 (6 7))))))"sv);
diff --git a/meta/tests/pp/tuple.c++ b/meta/tests/pp/tuple.c++
index 8dead230..aee38160 100644
--- a/meta/tests/pp/tuple.c++
+++ b/meta/tests/pp/tuple.c++
@@ -11,3 +11,4 @@ static_assert(AW_TO_STR(AW_FIRST( a,b,c )) == "a"sv);
 static_assert(AW_TO_STR(AW_SECOND( a,b,c )) == "b"sv);
 static_assert(AW_TO_STR(AW_TAIL( a,b,c )) == "b,c"sv);
 static_assert(AW_TO_STR(AW_UNPACK( AW_TUPLE(a,b,c) )) == "a,b,c"sv);
+static_assert(AW_TO_STR(AW_COMBINE( AW_TUPLE(a,b), AW_TUPLE(c,d)) ) == "(a,b,c,d)"sv);
diff --git a/meta/tests/pp/tuple_fold.c++ b/meta/tests/pp/tuple_fold.c++
new file mode 100644
index 00000000..d25ec609
--- /dev/null
+++ b/meta/tests/pp/tuple_fold.c++
@@ -0,0 +1,11 @@
+#include <aw/meta/pp/tuple.h>
+#include <aw/meta/pp/separators.h>
+#include <aw/meta/pp/foldr.h>
+
+#include <string_view>
+
+using namespace std::string_view_literals;
+
+static_assert(
+	AW_TO_STR(AW_FOLD_RIGHT( AW_COMBINE, AW_IDENTITY, (1), (2), (3), (4), (5), (6), (7) )) ==
+	"(1,2,3,4,5,6,7)"sv);