diff --git a/tests/src/unit-unicode3.cpp b/tests/src/unit-unicode3.cpp
index d5627d8cc..12c12eea4 100644
--- a/tests/src/unit-unicode3.cpp
+++ b/tests/src/unit-unicode3.cpp
@@ -306,8 +306,8 @@ TEST_CASE("Unicode (3/5)" * doctest::skip())
                         {
                             for (int byte4 = 0x00; byte4 <= 0xFF; ++byte4)
                             {
-                                // skip fourth second byte
-                                if (0x80 <= byte3 && byte3 <= 0xBF)
+                                // skip correct fourth byte
+                                if (0x80 <= byte4 && byte4 <= 0xBF)
                                 {
                                     continue;
                                 }
diff --git a/tests/src/unit-unicode4.cpp b/tests/src/unit-unicode4.cpp
index f15a1499f..43cf7095e 100644
--- a/tests/src/unit-unicode4.cpp
+++ b/tests/src/unit-unicode4.cpp
@@ -307,7 +307,7 @@ TEST_CASE("Unicode (4/5)" * doctest::skip())
                             for (int byte4 = 0x00; byte4 <= 0xFF; ++byte4)
                             {
                                 // skip correct fourth byte
-                                if (0x80 <= byte3 && byte3 <= 0xBF)
+                                if (0x80 <= byte4 && byte4 <= 0xBF)
                                 {
                                     continue;
                                 }
diff --git a/tests/src/unit-unicode5.cpp b/tests/src/unit-unicode5.cpp
index e35801823..bc0312820 100644
--- a/tests/src/unit-unicode5.cpp
+++ b/tests/src/unit-unicode5.cpp
@@ -307,7 +307,7 @@ TEST_CASE("Unicode (5/5)" * doctest::skip())
                             for (int byte4 = 0x00; byte4 <= 0xFF; ++byte4)
                             {
                                 // skip correct fourth byte
-                                if (0x80 <= byte3 && byte3 <= 0xBF)
+                                if (0x80 <= byte4 && byte4 <= 0xBF)
                                 {
                                     continue;
                                 }