diff --git a/AK/Tests/TestBinarySearch.cpp b/AK/Tests/TestBinarySearch.cpp
index bf7e2b8dc2..7d75028cfc 100644
--- a/AK/Tests/TestBinarySearch.cpp
+++ b/AK/Tests/TestBinarySearch.cpp
@@ -27,6 +27,7 @@
 #include <AK/TestSuite.h>
 
 #include <AK/BinarySearch.h>
+#include <cstring>
 
 TEST_CASE(vector_ints)
 {
diff --git a/AK/Tests/TestString.cpp b/AK/Tests/TestString.cpp
index fab4f1cc57..bd9a8fbc73 100644
--- a/AK/Tests/TestString.cpp
+++ b/AK/Tests/TestString.cpp
@@ -29,6 +29,7 @@
 #include <AK/FlyString.h>
 #include <AK/String.h>
 #include <AK/StringBuilder.h>
+#include <cstring>
 
 TEST_CASE(construct_empty)
 {
diff --git a/AK/Tests/TestStringUtils.cpp b/AK/Tests/TestStringUtils.cpp
index a284e86b2c..ce790941c7 100644
--- a/AK/Tests/TestStringUtils.cpp
+++ b/AK/Tests/TestStringUtils.cpp
@@ -105,7 +105,7 @@ TEST_CASE(convert_to_uint)
     AK::StringUtils::convert_to_uint("-1", ok);
     EXPECT(!ok);
 
-    uint actual = AK::StringUtils::convert_to_uint("0", ok);
+    unsigned actual = AK::StringUtils::convert_to_uint("0", ok);
     EXPECT(ok && actual == 0u);
 
     actual = AK::StringUtils::convert_to_uint("1", ok);