diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -129,7 +129,7 @@
 	test_bitcoin.cpp
 	test_bitcoin_main.cpp
 	timedata_tests.cpp
-  torcontrol_tests.cpp
+	torcontrol_tests.cpp
 	transaction_tests.cpp
 	txindex_tests.cpp
 	txvalidationcache_tests.cpp
diff --git a/src/test/data/generate_header.py b/src/test/data/generate_header.py
--- a/src/test/data/generate_header.py
+++ b/src/test/data/generate_header.py
@@ -8,8 +8,9 @@
     with open(input_file, "rb") as f:
         contents = f.read()
 
+    print("#include <cstdint>\n")
     print("namespace json_tests {")
-    print("static unsigned const char {}[] = {{".format(test_name))
+    print("static const uint8_t {}[] = {{".format(test_name))
     print(", ".join(map(lambda x: "0x{:02x}".format(ord(x)), contents)))
     print("};")
     print("};")