diff --git a/Source/UnitTests/Core/CoreTimingTest.cpp b/Source/UnitTests/Core/CoreTimingTest.cpp
index 8857ef8aba..67a4f4c716 100644
--- a/Source/UnitTests/Core/CoreTimingTest.cpp
+++ b/Source/UnitTests/Core/CoreTimingTest.cpp
@@ -26,7 +26,7 @@ static u64 s_expected_callback = 0;
 static s64 s_lateness = 0;
 
 template <unsigned int IDX>
-void CallbackTemplate(Core::System& system, u64 userdata, s64 lateness)
+void CallbackTemplate(Core::System& system, const u64 userdata, const s64 lateness)
 {
   static_assert(IDX < CB_IDS.size(), "IDX out of range");
   s_callbacks_ran_flags.set(IDX);
@@ -73,8 +73,8 @@ private:
   std::string m_profile_path;
 };
 
-static void AdvanceAndCheck(Core::System& system, u32 idx, int downcount, int expected_lateness = 0,
-                            int cpu_downcount = 0)
+static void AdvanceAndCheck(Core::System& system, const u32 idx, const int downcount,
+                            const int expected_lateness = 0, const int cpu_downcount = 0)
 {
   s_callbacks_ran_flags = 0;
   s_expected_callback = CB_IDS[idx];
@@ -132,7 +132,7 @@ namespace SharedSlotTest
 static unsigned int s_counter = 0;
 
 template <unsigned int ID>
-void FifoCallback(Core::System& system, u64 userdata, s64 lateness)
+void FifoCallback(Core::System& system, const u64 userdata, const s64 lateness)
 {
   static_assert(ID < CB_IDS.size(), "ID out of range");
   s_callbacks_ran_flags.set(ID);
@@ -206,7 +206,7 @@ namespace ChainSchedulingTest
 {
 static int s_reschedules = 0;
 
-static void RescheduleCallback(Core::System& system, u64 userdata, s64 lateness)
+static void RescheduleCallback(Core::System& system, const u64 userdata, const s64 lateness)
 {
   --s_reschedules;
   EXPECT_TRUE(s_reschedules >= 0);
@@ -269,7 +269,7 @@ namespace ScheduleIntoPastTest
 {
 static CoreTiming::EventType* s_cb_next = nullptr;
 
-static void ChainCallback(Core::System& system, u64 userdata, s64 lateness)
+static void ChainCallback(Core::System& system, const u64 userdata, const s64 lateness)
 {
   EXPECT_EQ(CB_IDS[0] + 1, userdata);
   EXPECT_EQ(0, lateness);
diff --git a/Source/UnitTests/Core/IOS/FS/FileSystemTest.cpp b/Source/UnitTests/Core/IOS/FS/FileSystemTest.cpp
index 1db600bb9a..52afa15fd2 100644
--- a/Source/UnitTests/Core/IOS/FS/FileSystemTest.cpp
+++ b/Source/UnitTests/Core/IOS/FS/FileSystemTest.cpp
@@ -251,7 +251,7 @@ TEST_F(FileSystemTest, RenameWithExistingTargetFile)
 
 TEST_F(FileSystemTest, GetDirectoryStats)
 {
-  auto check_stats = [this](u32 clusters, u32 inodes) {
+  auto check_stats = [this](const u32 clusters, const u32 inodes) {
     const Result<DirectoryStats> stats = m_fs->GetDirectoryStats("/tmp");
     ASSERT_TRUE(stats.Succeeded());
     EXPECT_EQ(stats->used_clusters, clusters);
@@ -308,7 +308,8 @@ TEST_F(FileSystemTest, Seek)
   EXPECT_EQ(file->GetStatus()->size, TEST_DATA.size());
   EXPECT_EQ(file->GetStatus()->offset, TEST_DATA.size());
 
-  auto seek_and_check = [&file](u32 offset, SeekMode mode, u32 expected_position) {
+  auto seek_and_check = [&file](const u32 offset, const SeekMode mode,
+                                const u32 expected_position) {
     const Result<u32> new_offset = file->Seek(offset, mode);
     ASSERT_TRUE(new_offset.Succeeded());
     EXPECT_EQ(*new_offset, expected_position);
diff --git a/Source/UnitTests/Core/MMIOTest.cpp b/Source/UnitTests/Core/MMIOTest.cpp
index a7c39c910a..457a579673 100644
--- a/Source/UnitTests/Core/MMIOTest.cpp
+++ b/Source/UnitTests/Core/MMIOTest.cpp
@@ -120,16 +120,17 @@ TEST_F(MappingTest, ReadWriteComplex)
 {
   bool read_called = false, write_called = false;
 
-  m_mapping->Register(0x0C001234, MMIO::ComplexRead<u8>([&read_called](Core::System&, u32 addr) {
-                        EXPECT_EQ(0x0C001234u, addr);
-                        read_called = true;
-                        return 0x12;
-                      }),
-                      MMIO::ComplexWrite<u8>([&write_called](Core::System&, u32 addr, u8 val) {
-                        EXPECT_EQ(0x0C001234u, addr);
-                        EXPECT_EQ(0x34, val);
-                        write_called = true;
-                      }));
+  m_mapping->Register(
+      0x0C001234, MMIO::ComplexRead<u8>([&read_called](Core::System&, const u32 addr) {
+        EXPECT_EQ(0x0C001234u, addr);
+        read_called = true;
+        return 0x12;
+      }),
+      MMIO::ComplexWrite<u8>([&write_called](Core::System&, const u32 addr, const u8 val) {
+        EXPECT_EQ(0x0C001234u, addr);
+        EXPECT_EQ(0x34, val);
+        write_called = true;
+      }));
 
   u8 val = m_mapping->Read<u8>(*m_system, 0x0C001234);
   EXPECT_EQ(0x12, val);