diff --git a/tests/regression/74-invalid_deref/30-mem-oob-struct.c b/tests/regression/74-invalid_deref/30-mem-oob-struct.c
index bf0a7304be8..04208e953b1 100644
--- a/tests/regression/74-invalid_deref/30-mem-oob-struct.c
+++ b/tests/regression/74-invalid_deref/30-mem-oob-struct.c
@@ -2,28 +2,23 @@
 #include <stdlib.h>
 
 struct A {
-	unsigned char a;
-	unsigned char b;
-	unsigned char c;
-	unsigned char d;
-	unsigned char e;
-	unsigned char f;
-	unsigned char g;
-	unsigned char h;
+unsigned int a;
+unsigned int b;
 };
 
 int main(void)
 {
-	struct A *p;
-	struct A *f;
-	p = malloc(9);
+    struct A *p;
+    struct A *f;
+    p = malloc(9);
     
     p->a = 1; // NOWARN
 
     f = p + 1;
 
     f->b = 2; // WARN
-
-	free(p);
+    (f-1)->a = 3;
+    (f-1+(2))->b = 4;
+    free(p);
 }
 
diff --git a/tests/regression/97-relational-malloc/02-simple-if-else.c b/tests/regression/97-relational-malloc/02-simple-if-else.c
index 52534ad8ace..0e71c8f89c7 100644
--- a/tests/regression/97-relational-malloc/02-simple-if-else.c
+++ b/tests/regression/97-relational-malloc/02-simple-if-else.c
@@ -1,27 +1,27 @@
 //PARAM: --set ana.activated[+] memOutOfBounds --enable ana.int.interval  --set ana.activated[+] apron  --set ana.apron.domain polyhedra 
 int main() {
-	int len;
-	int top;
+    int len;
+    int top;
 
-	if(top) {
-		len = 5;
-	} else {
-		len = 10;
-	}
+    if(top) {
+        len = 5;
+    } else {
+        len = 10;
+    }
 
-	char* ptr = malloc(2*len);
+    char* ptr = malloc(2*len);
     char* ptr2 = malloc(sizeof(char)*len);
-	for(int i=0;i < len;i++) {
-		int t = rand();
-		if (t > len ){
-			t = len -1;
-		}else {
-			t= t-1;
-			if (t < 0){
-				t = 0;
-			}
-		}
-		char s  = ptr[t]; //NOWARN
-		assert(i < len);
-	}
+    for(int i=0;i < len;i++) {
+        int t = rand();
+        if (t > len ){
+            t = len -1;
+        }else {
+            t= t-1;
+            if (t < 0){
+                t = 0;
+            }
+        }
+        char s  = ptr[t]; //NOWARN
+        assert(i < len);
+    }
 }
\ No newline at end of file
diff --git a/tests/regression/97-relational-malloc/03-global.c b/tests/regression/97-relational-malloc/03-global.c
index 1be3dc31219..c7179948393 100644
--- a/tests/regression/97-relational-malloc/03-global.c
+++ b/tests/regression/97-relational-malloc/03-global.c
@@ -1,18 +1,18 @@
 //PARAM: --set ana.activated[+] memOutOfBounds --enable ana.int.interval --set ana.activated[+] apron --set ana.apron.domain polyhedra
 int readUntil(char arr[], int len) {
-	for(int i=0;i < len;i++) {
-		char s  = arr[i]; //NOWARN
-	}
+    for(int i=0;i < len;i++) {
+        char s  = arr[i]; //NOWARN
+    }
 }
 
 int main() {
-	int len;
-	int top;
-	if(top) {
-		len = 5;
-	} else {
-		len = 10;
-	}
-	char* ptr = malloc(sizeof(char)*len);
-	readUntil(ptr, len);
+    int len;
+    int top;
+    if(top) {
+        len = 5;
+    } else {
+        len = 10;
+    }
+    char* ptr = malloc(sizeof(char)*len);
+    readUntil(ptr, len);
 }
\ No newline at end of file
diff --git a/tests/regression/98-relational-array-oob/03-simple-if-else.c b/tests/regression/98-relational-array-oob/03-simple-if-else.c
index 87fdf233737..d1b9e48aa82 100644
--- a/tests/regression/98-relational-array-oob/03-simple-if-else.c
+++ b/tests/regression/98-relational-array-oob/03-simple-if-else.c
@@ -2,19 +2,19 @@
 
 int main()
 {
-	int len;
-	int top;
+    int len;
+    int top;
 
-	if(top) {
-		len = 5;
-	} else {
-		len = 10;
-	}
+    if(top) {
+        len = 5;
+    } else {
+        len = 10;
+    }
 
-	char ptr[len];
+    char ptr[len];
 
-	for(int i=0;i < len;i++) {
-		char s  = ptr[i]; //NOWARN
-	}
+    for(int i=0;i < len;i++) {
+        char s  = ptr[i]; //NOWARN
+    }
 }
 
diff --git a/tests/regression/98-relational-array-oob/04-global.c b/tests/regression/98-relational-array-oob/04-global.c
index f104cce63a3..ed476acd343 100644
--- a/tests/regression/98-relational-array-oob/04-global.c
+++ b/tests/regression/98-relational-array-oob/04-global.c
@@ -1,21 +1,21 @@
 //PARAM: --enable ana.arrayoob --enable ana.int.interval   --set ana.activated[+] apron   --set sem.int.signed_overflow assume_none 
 
 int readUntil(char arr[], unsigned len) {
-	for(unsigned int i=0;i < len;i++) {
-			char s  = arr[i]; //NOWARN
-	}
+    for(unsigned int i=0;i < len;i++) {
+            char s  = arr[i]; //NOWARN
+    }
 }
 
 int main() {
-	unsigned int len;
-	unsigned int top;
+    unsigned int len;
+    unsigned int top;
 
-	if(top) {
-		len = 5;
-	} else {
-		len = 10;
-	}
+    if(top) {
+        len = 5;
+    } else {
+        len = 10;
+    }
 
-	char ptr[len];
-	readUntil(ptr, len);
+    char ptr[len];
+    readUntil(ptr, len);
 }