diff --git a/thirdparty/catch2/src/main/native/cpp/catch2/catch_version.cpp b/thirdparty/catch2/src/main/native/cpp/catch2/catch_version.cpp
index eb385fe291..c815dba5b3 100644
--- a/thirdparty/catch2/src/main/native/cpp/catch2/catch_version.cpp
+++ b/thirdparty/catch2/src/main/native/cpp/catch2/catch_version.cpp
@@ -36,7 +36,7 @@ namespace Catch {
     }
 
     Version const& libraryVersion() {
-        static Version version( 3, 15, 0, "", 0 );
+        static Version version( 3, 15, 1, "", 0 );
         return version;
     }
 
diff --git a/thirdparty/catch2/src/main/native/cpp/catch2/internal/catch_textflow.cpp b/thirdparty/catch2/src/main/native/cpp/catch2/internal/catch_textflow.cpp
index 3979048f37..0646b10f9c 100644
--- a/thirdparty/catch2/src/main/native/cpp/catch2/internal/catch_textflow.cpp
+++ b/thirdparty/catch2/src/main/native/cpp/catch2/internal/catch_textflow.cpp
@@ -148,8 +148,8 @@ namespace Catch {
                 m_it--;
             }
             // Skip back over UTF-8 continuation bytes to the leading byte
-            while ( isUtf8ContinuationByte( *m_it ) ) {
-                assert( m_it != m_string->begin() );
+            while ( m_it != m_string->begin() &&
+                    isUtf8ContinuationByte( *m_it ) ) {
                 m_it--;
             }
         }
diff --git a/thirdparty/catch2/src/main/native/include/catch2/catch_version_macros.hpp b/thirdparty/catch2/src/main/native/include/catch2/catch_version_macros.hpp
index 41fc51aff7..f60b3199f5 100644
--- a/thirdparty/catch2/src/main/native/include/catch2/catch_version_macros.hpp
+++ b/thirdparty/catch2/src/main/native/include/catch2/catch_version_macros.hpp
@@ -10,6 +10,6 @@
 
 #define CATCH_VERSION_MAJOR 3
 #define CATCH_VERSION_MINOR 15
-#define CATCH_VERSION_PATCH 0
+#define CATCH_VERSION_PATCH 1
 
 #endif // CATCH_VERSION_MACROS_HPP_INCLUDED
diff --git a/thirdparty/catch2/src/main/native/include/catch2/internal/catch_template_test_registry.hpp b/thirdparty/catch2/src/main/native/include/catch2/internal/catch_template_test_registry.hpp
index 7aec888feb..400c308c7f 100644
--- a/thirdparty/catch2/src/main/native/include/catch2/internal/catch_template_test_registry.hpp
+++ b/thirdparty/catch2/src/main/native/include/catch2/internal/catch_template_test_registry.hpp
@@ -245,42 +245,42 @@
         INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_TEST_CASE_METHOD_2( INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_CLASS_ ), INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_ ) , ClassName, Name, Tags, Signature, __VA_ARGS__ ) )
 #endif
 
-    #define INTERNAL_CATCH_TEMPLATE_PRODUCT_TEST_CASE_METHOD_2(TestNameClass, TestName, ClassName, Name, Tags, Signature, TmplTypes, TypesList)\
-        CATCH_INTERNAL_START_WARNINGS_SUPPRESSION \
-        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_ZERO_VARIADIC_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_UNUSED_TEMPLATE_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_UNUSED_VARIABLE_WARNINGS \
+#define INTERNAL_CATCH_TEMPLATE_PRODUCT_TEST_CASE_METHOD_2(TestNameClass, TestName, ClassName, Name, Tags, Signature, TmplTypes, TypesList)\
+    CATCH_INTERNAL_START_WARNINGS_SUPPRESSION \
+    CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_ZERO_VARIADIC_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_TEMPLATE_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_VARIABLE_WARNINGS \
+    namespace {\
         template<typename TestType> \
-            struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName <TestType>) { \
-                void test();\
-            };\
-        namespace {\
-        namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestNameClass) {\
-            INTERNAL_CATCH_TYPE_GEN                  \
-            INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
-            template<typename...Types>\
-            struct TestNameClass{\
-                void reg_tests(){\
-                    std::size_t index = 0;\
-                    using expander = std::size_t[];\
-                    constexpr char const* tmpl_types[] = {CATCH_REC_LIST(INTERNAL_CATCH_STRINGIZE_WITHOUT_PARENS, INTERNAL_CATCH_REMOVE_PARENS(TmplTypes))};\
-                    constexpr char const* types_list[] = {CATCH_REC_LIST(INTERNAL_CATCH_STRINGIZE_WITHOUT_PARENS, INTERNAL_CATCH_REMOVE_PARENS(TypesList))};\
-                    constexpr auto num_types = sizeof(types_list) / sizeof(types_list[0]);\
-                    (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestName<Types>::test ), CATCH_INTERNAL_LINEINFO, #ClassName, Catch::NameAndTags{ Name " - " + std::string(tmpl_types[index / num_types]) + '<' + types_list[index % num_types] + '>', Tags } ), index++)... };/* NOLINT */ \
-                }\
-            };\
-            static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
-                using TestInit = typename create<TestNameClass, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
-                TestInit t;\
-                t.reg_tests();\
-                return 0;\
-            }(); \
-        }\
-        }\
-        CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
-        template<typename TestType> \
-        void TestName<TestType>::test()
+        struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName <TestType>) { \
+            void test();\
+        };\
+    namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestNameClass) {\
+        INTERNAL_CATCH_TYPE_GEN                  \
+        INTERNAL_CATCH_NTTP_GEN(INTERNAL_CATCH_REMOVE_PARENS(Signature))\
+        template<typename...Types>\
+        struct TestNameClass{\
+            void reg_tests(){\
+                std::size_t index = 0;\
+                using expander = std::size_t[];\
+                constexpr char const* tmpl_types[] = {CATCH_REC_LIST(INTERNAL_CATCH_STRINGIZE_WITHOUT_PARENS, INTERNAL_CATCH_REMOVE_PARENS(TmplTypes))};\
+                constexpr char const* types_list[] = {CATCH_REC_LIST(INTERNAL_CATCH_STRINGIZE_WITHOUT_PARENS, INTERNAL_CATCH_REMOVE_PARENS(TypesList))};\
+                constexpr auto num_types = sizeof(types_list) / sizeof(types_list[0]);\
+                (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestName<Types>::test ), CATCH_INTERNAL_LINEINFO, #ClassName, Catch::NameAndTags{ Name " - " + std::string(tmpl_types[index / num_types]) + '<' + types_list[index % num_types] + '>', Tags } ), index++)... };/* NOLINT */ \
+            }\
+        };\
+        static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
+            using TestInit = typename create<TestNameClass, decltype(get_wrapper<INTERNAL_CATCH_REMOVE_PARENS(TmplTypes)>(Catch::Detail::priority_tag<1>{})), TypeList<INTERNAL_CATCH_MAKE_TYPE_LISTS_FROM_TYPES(INTERNAL_CATCH_REMOVE_PARENS(TypesList))>>::type;\
+            TestInit t;\
+            t.reg_tests();\
+            return 0;\
+        }(); \
+    }\
+    }\
+    CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
+    template<typename TestType> \
+    void TestName<TestType>::test()
 
 #ifndef CATCH_CONFIG_TRADITIONAL_MSVC_PREPROCESSOR
     #define INTERNAL_CATCH_TEMPLATE_PRODUCT_TEST_CASE_METHOD( ClassName, Name, Tags, ... )\
@@ -298,37 +298,37 @@
         INTERNAL_CATCH_EXPAND_VARGS( INTERNAL_CATCH_TEMPLATE_PRODUCT_TEST_CASE_METHOD_2( INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_ ), INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_ ), ClassName, Name, Tags, Signature,__VA_ARGS__ ) )
 #endif
 
-    #define INTERNAL_CATCH_TEMPLATE_LIST_TEST_CASE_METHOD_2( TestNameClass, TestName, ClassName, Name, Tags, TmplList) \
-        CATCH_INTERNAL_START_WARNINGS_SUPPRESSION \
-        CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_UNUSED_TEMPLATE_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_UNUSED_VARIABLE_WARNINGS \
-        CATCH_INTERNAL_SUPPRESS_COMMA_WARNINGS \
+#define INTERNAL_CATCH_TEMPLATE_LIST_TEST_CASE_METHOD_2( TestNameClass, TestName, ClassName, Name, Tags, TmplList) \
+    CATCH_INTERNAL_START_WARNINGS_SUPPRESSION \
+    CATCH_INTERNAL_SUPPRESS_GLOBALS_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_TEMPLATE_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_UNUSED_VARIABLE_WARNINGS \
+    CATCH_INTERNAL_SUPPRESS_COMMA_WARNINGS \
+    namespace {\
         template<typename TestType> \
         struct TestName : INTERNAL_CATCH_REMOVE_PARENS(ClassName <TestType>) { \
             void test();\
         };\
-        namespace {\
-        namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestName){ \
-            INTERNAL_CATCH_TYPE_GEN\
-            template<typename...Types>\
-            struct TestNameClass{\
-                void reg_tests(){\
-                    size_t index = 0;\
-                    using expander = size_t[];\
-                    (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestName<Types>::test ), CATCH_INTERNAL_LINEINFO, #ClassName##_catch_sr, Catch::NameAndTags{ Name " - " INTERNAL_CATCH_STRINGIZE(TmplList) " - " + std::to_string(index), Tags } ), index++)... };/* NOLINT */ \
-                }\
-            };\
-            static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
-                using TestInit = typename convert<TestNameClass, TmplList>::type;\
-                TestInit t;\
-                t.reg_tests();\
-                return 0;\
-            }(); \
-        }}\
-        CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
-        template<typename TestType> \
-        void TestName<TestType>::test()
+    namespace INTERNAL_CATCH_MAKE_NAMESPACE(TestName){ \
+        INTERNAL_CATCH_TYPE_GEN\
+        template<typename...Types>\
+        struct TestNameClass{\
+            void reg_tests(){\
+                size_t index = 0;\
+                using expander = size_t[];\
+                (void)expander{(Catch::AutoReg( Catch::makeTestInvoker( &TestName<Types>::test ), CATCH_INTERNAL_LINEINFO, #ClassName##_catch_sr, Catch::NameAndTags{ Name " - " INTERNAL_CATCH_STRINGIZE(TmplList) " - " + std::to_string(index), Tags } ), index++)... };/* NOLINT */ \
+            }\
+        };\
+        static const int INTERNAL_CATCH_UNIQUE_NAME( globalRegistrar ) = [](){\
+            using TestInit = typename convert<TestNameClass, TmplList>::type;\
+            TestInit t;\
+            t.reg_tests();\
+            return 0;\
+        }(); \
+    }}\
+    CATCH_INTERNAL_STOP_WARNINGS_SUPPRESSION \
+    template<typename TestType> \
+    void TestName<TestType>::test()
 
 #define INTERNAL_CATCH_TEMPLATE_LIST_TEST_CASE_METHOD(ClassName, Name, Tags, TmplList) \
         INTERNAL_CATCH_TEMPLATE_LIST_TEST_CASE_METHOD_2( INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_ ), INTERNAL_CATCH_UNIQUE_NAME( CATCH2_INTERNAL_TEMPLATE_TEST_ ), ClassName, Name, Tags, TmplList )
diff --git a/upstream_utils/catch2.py b/upstream_utils/catch2.py
index 0d5d6da779..4692584e0a 100755
--- a/upstream_utils/catch2.py
+++ b/upstream_utils/catch2.py
@@ -49,7 +49,7 @@ def copy_upstream_src(wpilib_root: Path):
 def main():
     name = "catch2"
     url = "https://github.com/catchorg/Catch2.git"
-    tag = "v3.15.0"
+    tag = "v3.15.1"
 
     patch_options = {
         "ignore_whitespace": True,