diff --git a/test/val/lib_runtime_aslax7.c b/test/val/lib_runtime_aslax7.c
index ea8f0b375..7e3b4796a 100644
--- a/test/val/lib_runtime_aslax7.c
+++ b/test/val/lib_runtime_aslax7.c
@@ -26,7 +26,7 @@ int main (void)
         printf("wrong result on int %d << 7: %04X, expected %04X\n", ai, ti, refi);
         return 1;
       }
-    } while (ai != -32768);
+    } while (++ai != -32768);
 
     do {
       refc = ac << 4;
@@ -38,7 +38,7 @@ int main (void)
         printf("wrong result on char %d << 7: %04X, expected %04X\n", ac, tc, refc);
         return 1;
       }
-    } while (ac != -128);
+    } while (++ac != -128);
 
     return 0;
 }
diff --git a/test/val/lib_runtime_asrax7.c b/test/val/lib_runtime_asrax7.c
index 942efea1d..3cdf2aab8 100644
--- a/test/val/lib_runtime_asrax7.c
+++ b/test/val/lib_runtime_asrax7.c
@@ -26,7 +26,7 @@ int main (void)
         printf("wrong result on int %d >> 7: %04X, expected %04X\n", ai, ti, refi);
         return 1;
       }
-    } while (ai != -32768);
+    } while (++ai != -32768);
 
     do {
       refc = ac >> 4;
@@ -38,7 +38,7 @@ int main (void)
         printf("wrong result on char %d >> 7: %04X, expected %04X\n", ac, tc, refc);
         return 1;
       }
-    } while (ac != -128);
+    } while (++ac != -128);
 
     return 0;
 }
diff --git a/test/val/lib_runtime_shlax7.c b/test/val/lib_runtime_shlax7.c
index 9a4869438..d2073ca3a 100644
--- a/test/val/lib_runtime_shlax7.c
+++ b/test/val/lib_runtime_shlax7.c
@@ -26,7 +26,7 @@ int main (void)
         printf("wrong result on int %u << 7: %04X, expected %04X\n", ai, ti, refi);
         return 1;
       }
-    } while (ai != 0);
+    } while (++ai != 0);
 
     do {
       refc = ac << 4;
@@ -38,7 +38,7 @@ int main (void)
         printf("wrong result on char %u << 7: %04X, expected %04X\n", ac, tc, refc);
         return 1;
       }
-    } while (ac != 0);
+    } while (++ac != 0);
 
     return 0;
 }
diff --git a/test/val/lib_runtime_shrax7.c b/test/val/lib_runtime_shrax7.c
index db7356d0e..d3bc0db73 100644
--- a/test/val/lib_runtime_shrax7.c
+++ b/test/val/lib_runtime_shrax7.c
@@ -26,7 +26,7 @@ int main (void)
         printf("wrong result on int %d >> 7: %04X, expected %04X\n", ai, ti, refi);
         return 1;
       }
-    } while (ai != 0);
+    } while (++ai != 0);
 
     do {
       refc = ac >> 4;
@@ -38,7 +38,7 @@ int main (void)
         printf("wrong result on char %d >> 7: %04X, expected %04X\n", ac, tc, refc);
         return 1;
       }
-    } while (ac != 0);
+    } while (++ac != 0);
 
     return 0;
 }