diff --git a/test/testsuites/danmar-verify/divbyzero.cpp b/test/testsuites/danmar-verify/divbyzero.cpp
index 10e0657fc..ffd7b7bb4 100644
--- a/test/testsuites/danmar-verify/divbyzero.cpp
+++ b/test/testsuites/danmar-verify/divbyzero.cpp
@@ -1,6 +1,8 @@
 // make USE_Z3=yes
 // ./cppcheck --verify --inline-suppr --enable=information test/testsuites/danmar-verify/divbyzero.cpp
 
+#include <stdio.h>
+#include <map>
 
 struct S { int x; };
 
@@ -8,61 +10,65 @@ int globalvar;
 
 void dostuff();
 
-void callfunc1() {
+int callfunc1() {
     int x = 16;
     scanf("%i\n", &x);
     // cppcheck-suppress verificationDivByZero
     return 100000 / x;
 }
 
-void float1(float f) {
+int float1(float f) {
     // cppcheck-suppress verificationDivByZero
     return 100000 / (int)f;
 }
 
-void float2(float f) {
+float float2(float f) {
     // cppcheck-suppress verificationDivByZeroFloat
     return 100000 / f;
 }
 
-void functionCall() {
+int functionCall() {
+#ifdef __clang__
+    return 0;
+#else
     // cppcheck-suppress verificationDivByZero
     return 100000 / unknown_function();
+#endif
 }
 
-void globalVar1() {
+int globalVar1() {
     // cppcheck-suppress verificationDivByZero
     return 100000 / globalvar;
 }
 
-void globalVar1() {
+int globalVar2() {
     globalvar = 123;
     dostuff();
     // cppcheck-suppress verificationDivByZero
     return 100000 / globalvar;
 }
 
-void pointer1(int *p) {
+int pointer1(int *p) {
     // cppcheck-suppress verificationDivByZero
     return 100000 / *p;
 }
 
-void pointer2(int *p) {
+int pointer2(int *p) {
     // cppcheck-suppress verificationDivByZero
     return 100000 / p[32];
 }
 
-void stdmap(std::map<int,int> &data) {
+int stdmap(std::map<int,int> &data) {
     // cppcheck-suppress verificationDivByZero
     return 100000 / data[43];
 }
 
-void struct1(struct S *s) {
+int struct1(struct S *s) {
     // cppcheck-suppress verificationDivByZero
     return 100000 / s->x;
 }
 
-void trycatch() {
+int trycatch() {
     int x = 0;
     try {
         dostuff();
diff --git a/test/testsuites/danmar-verify/uninit.c b/test/testsuites/danmar-verify/uninit.c
index 3eeadd528..ba3178099 100644
--- a/test/testsuites/danmar-verify/uninit.c
+++ b/test/testsuites/danmar-verify/uninit.c
@@ -2,6 +2,8 @@
 // make USE_Z3=yes
 // ./cppcheck --verify --inline-suppr --enable=information test/testsuites/danmar-verify/uninit.c
 
+#include <string.h>
+
 int array1() {
     int a[10];
     a[0] = 0;
@@ -16,7 +18,7 @@ int array2() {
     return a[2][3];
 }
 
-void local1() {
+int local1() {
     int x;
     // cppcheck-suppress verificationUninit
     // cppcheck-suppress uninitvar
@@ -28,8 +30,8 @@ int pointer1(int *p) {
     return *p;
 }
 
-void pointer2(char *p) {
+int pointer2(char *p) {
     // cppcheck-suppress verificationUninitArg
-    strlen(p);
+    return strlen(p);
 }