diff --git a/src/Makefile.test.include b/src/Makefile.test.include
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -78,8 +78,12 @@
   avalanche/test/util.cpp \
   test/fixture.cpp \
   test/jsonutil.cpp \
+  test/util/setup_common.h \
+  test/util/setup_common.cpp \
   test/scriptflags.cpp \
   test/sigutil.cpp \
+  test/util/str.h \
+  test/util/str.cpp \
   $(TEST_UTIL_H)
 
 FUZZ_SUITE = \
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -50,6 +50,7 @@
 	util/blockfilter.cpp
 	util/logging.cpp
 	util/setup_common.cpp
+	util/str.cpp
 	util/transaction_utils.cpp
 )
 
diff --git a/src/test/cashaddr_tests.cpp b/src/test/cashaddr_tests.cpp
--- a/src/test/cashaddr_tests.cpp
+++ b/src/test/cashaddr_tests.cpp
@@ -6,6 +6,7 @@
 #include <cashaddr.h>
 
 #include <test/util/setup_common.h>
+#include <test/util/str.h>
 
 #include <boost/test/unit_test.hpp>
 
@@ -16,28 +17,6 @@
 
 BOOST_FIXTURE_TEST_SUITE(cashaddr_tests, BasicTestingSetup)
 
-bool CaseInsensitiveEqual(const std::string &s1, const std::string &s2) {
-    if (s1.size() != s2.size()) {
-        return false;
-    }
-
-    for (size_t i = 0; i < s1.size(); ++i) {
-        char c1 = s1[i];
-        if (c1 >= 'A' && c1 <= 'Z') {
-            c1 -= ('A' - 'a');
-        }
-        char c2 = s2[i];
-        if (c2 >= 'A' && c2 <= 'Z') {
-            c2 -= ('A' - 'a');
-        }
-        if (c1 != c2) {
-            return false;
-        }
-    }
-
-    return true;
-}
-
 BOOST_AUTO_TEST_CASE(cashaddr_testvectors_valid) {
     static const std::string CASES[] = {
         "prefix:x64nx6hz",
diff --git a/src/test/util/str.h b/src/test/util/str.h
new file mode 100644
--- /dev/null
+++ b/src/test/util/str.h
@@ -0,0 +1,12 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_TEST_UTIL_STR_H
+#define BITCOIN_TEST_UTIL_STR_H
+
+#include <string>
+
+bool CaseInsensitiveEqual(const std::string &s1, const std::string &s2);
+
+#endif // BITCOIN_TEST_UTIL_STR_H
diff --git a/src/test/util/str.cpp b/src/test/util/str.cpp
new file mode 100644
--- /dev/null
+++ b/src/test/util/str.cpp
@@ -0,0 +1,30 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <test/util/str.h>
+
+#include <cstdint>
+#include <string>
+
+bool CaseInsensitiveEqual(const std::string &s1, const std::string &s2) {
+    if (s1.size() != s2.size()) {
+        return false;
+    }
+
+    for (size_t i = 0; i < s1.size(); ++i) {
+        char c1 = s1[i];
+        if (c1 >= 'A' && c1 <= 'Z') {
+            c1 -= ('A' - 'a');
+        }
+        char c2 = s2[i];
+        if (c2 >= 'A' && c2 <= 'Z') {
+            c2 -= ('A' - 'a');
+        }
+        if (c1 != c2) {
+            return false;
+        }
+    }
+
+    return true;
+}