diff --git a/Ast/src/Parser.cpp b/Ast/src/Parser.cpp
index 6b7dc854..b26cd993 100644
--- a/Ast/src/Parser.cpp
+++ b/Ast/src/Parser.cpp
@@ -26,7 +26,7 @@ LUAU_DYNAMIC_FASTFLAGVARIABLE(LuaReportParseIntegerIssues, false)
 
 LUAU_FASTFLAGVARIABLE(LuauAlwaysCaptureHotComments, false)
 
-LUAU_FASTFLAGVARIABLE(LuauInterpolatedStringBaseSupport, true)
+LUAU_FASTFLAGVARIABLE(LuauInterpolatedStringBaseSupport, false)
 
 bool lua_telemetry_parsed_out_of_range_bin_integer = false;
 bool lua_telemetry_parsed_out_of_range_hex_integer = false;
diff --git a/tests/TypeInfer.test.cpp b/tests/TypeInfer.test.cpp
index 712b0eba..0e169c81 100644
--- a/tests/TypeInfer.test.cpp
+++ b/tests/TypeInfer.test.cpp
@@ -8,6 +8,7 @@
 #include "Luau/VisitTypeVar.h"
 
 #include "Fixture.h"
+#include "ScopedFlags.h"
 
 #include "doctest.h"
 
@@ -815,6 +816,8 @@ end
 
 TEST_CASE_FIXTURE(Fixture, "tc_interpolated_string_basic")
 {
+    ScopedFastFlag sff{"LuauInterpolatedStringBaseSupport", true};
+
     CheckResult result = check(R"(
         local foo: string = `hello {"world"}`
     )");
@@ -824,6 +827,8 @@ TEST_CASE_FIXTURE(Fixture, "tc_interpolated_string_basic")
 
 TEST_CASE_FIXTURE(Fixture, "tc_interpolated_string_with_invalid_expression")
 {
+    ScopedFastFlag sff{"LuauInterpolatedStringBaseSupport", true};
+
     CheckResult result = check(R"(
         local function f(x: number) end