diff --git a/Analysis/include/Luau/ToString.h b/Analysis/include/Luau/ToString.h
index b0ab0cd5..935aadce 100644
--- a/Analysis/include/Luau/ToString.h
+++ b/Analysis/include/Luau/ToString.h
@@ -11,6 +11,7 @@
 
 LUAU_FASTINT(LuauTableTypeMaximumStringifierLength)
 LUAU_FASTINT(LuauTypeMaximumStringifierLength)
+LUAU_FASTFLAG(LuauToStringSimpleCompositeTypesSingleLine)
 
 namespace Luau
 {
@@ -39,6 +40,12 @@ struct ToStringNameMap
 
 struct ToStringOptions
 {
+    ToStringOptions(bool exhaustive = false)
+        : exhaustive(exhaustive)
+        , compositeTypesSingleLineLimit(FFlag::LuauToStringSimpleCompositeTypesSingleLine.value ? 5 : 0)
+    {
+    }
+
     bool exhaustive = false;                      // If true, we produce complete output rather than comprehensible output
     bool useLineBreaks = false;                   // If true, we insert new lines to separate long results such as table entries/metatable.
     bool functionTypeArguments = false;           // If true, output function type argument names when they are available
diff --git a/Analysis/src/ToString.cpp b/Analysis/src/ToString.cpp
index 2f0f38e1..67350438 100644
--- a/Analysis/src/ToString.cpp
+++ b/Analysis/src/ToString.cpp
@@ -17,6 +17,7 @@
 
 LUAU_FASTFLAG(DebugLuauDeferredConstraintResolution)
 LUAU_FASTFLAGVARIABLE(LuauToStringPrettifyLocation, false)
+LUAU_FASTFLAGVARIABLE(LuauToStringSimpleCompositeTypesSingleLine, false)
 
 /*
  * Enables increasing levels of verbosity for Luau type names when stringifying.
diff --git a/tests/ToString.test.cpp b/tests/ToString.test.cpp
index 25c09092..1bfc9872 100644
--- a/tests/ToString.test.cpp
+++ b/tests/ToString.test.cpp
@@ -216,6 +216,7 @@ TEST_CASE_FIXTURE(Fixture, "functions_are_always_parenthesized_in_unions_or_inte
 
 TEST_CASE_FIXTURE(Fixture, "simple_intersections_printed_on_one_line")
 {
+    ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
     CheckResult result = check(R"(
         local a: string & number
     )");
@@ -228,6 +229,7 @@ TEST_CASE_FIXTURE(Fixture, "simple_intersections_printed_on_one_line")
 
 TEST_CASE_FIXTURE(Fixture, "complex_intersections_printed_on_multiple_lines")
 {
+    ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
     CheckResult result = check(R"(
         local a: string & number & boolean
     )");
@@ -246,6 +248,7 @@ TEST_CASE_FIXTURE(Fixture, "complex_intersections_printed_on_multiple_lines")
 
 TEST_CASE_FIXTURE(Fixture, "overloaded_functions_always_printed_on_multiple_lines")
 {
+    ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
     CheckResult result = check(R"(
         local a: ((string) -> string) & ((number) -> number)
     )");
@@ -262,6 +265,7 @@ TEST_CASE_FIXTURE(Fixture, "overloaded_functions_always_printed_on_multiple_line
 
 TEST_CASE_FIXTURE(Fixture, "simple_unions_printed_on_one_line")
 {
+    ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
     CheckResult result = check(R"(
         local a: number | boolean
     )");
@@ -274,6 +278,7 @@ TEST_CASE_FIXTURE(Fixture, "simple_unions_printed_on_one_line")
 
 TEST_CASE_FIXTURE(Fixture, "complex_unions_printed_on_multiple_lines")
 {
+    ScopedFastFlag sff{"LuauToStringSimpleCompositeTypesSingleLine", true};
     CheckResult result = check(R"(
         local a: string | number | boolean
     )");