diff --git a/tests/padds_i8.ispc b/tests/padds_i8.ispc
index 81da8a21..d7bdc8b6 100644
--- a/tests/padds_i8.ispc
+++ b/tests/padds_i8.ispc
@@ -3,7 +3,7 @@ export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
     uniform int8 a = 127, b = 127; // max signed int8
-    RET[programIndex] = padds(a1, b1);
+    RET[programIndex] = padds(a, b);
 }
 
 export void result(uniform float RET[]) {
diff --git a/tests/paddus_i8.ispc b/tests/paddus_i8.ispc
index 23de8c21..1c585369 100644
--- a/tests/paddus_i8.ispc
+++ b/tests/paddus_i8.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    uniform int8 a = 255, b = 255; // max unsigned int8
+    uniform unsigned int8 a = 255, b = 255; // max unsigned int8
     RET[programIndex] = paddus(a, b);
 }
 
diff --git a/tests/paddus_vi8.ispc b/tests/paddus_vi8.ispc
index 3d7d3509..c9d7a115 100644
--- a/tests/paddus_vi8.ispc
+++ b/tests/paddus_vi8.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    varying int8 a = 255, b = 255; // max unsigned int8
+    varying unsigned int8 a = 255, b = 255; // max unsigned int8
     RET[programIndex] = paddus(a, b);
 }
 
diff --git a/tests/psubs_i16.ispc b/tests/psubs_i16.ispc
index 9038215e..d66f51ad 100644
--- a/tests/psubs_i16.ispc
+++ b/tests/psubs_i16.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    uniform int8 a = -32768, b = 32767; // min and max signed int16
+    uniform int16 a = -32768, b = 32767; // min and max signed int16
     RET[programIndex] = psubs(a, b);
 }
 
diff --git a/tests/psubus_i16.ispc b/tests/psubus_i16.ispc
index b31b250e..c02922d2 100644
--- a/tests/psubus_i16.ispc
+++ b/tests/psubus_i16.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    uniform int8 a = 0, b = 32767; // min and max unsigned int16
+    uniform unsigned int8 a = 0, b = 32767; // min and max unsigned int16
     RET[programIndex] = psubus(a, b);
 }
 
diff --git a/tests/psubus_i8.ispc b/tests/psubus_i8.ispc
index c073d306..a45e9f6e 100644
--- a/tests/psubus_i8.ispc
+++ b/tests/psubus_i8.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    uniform int8 a = 0, b = 255; // min and max unsigned int8
+    uniform unsigned int8 a = 0, b = 255; // min and max unsigned int8
     RET[programIndex] = psubus(a, b);
 }
 
diff --git a/tests/psubus_vi8.ispc b/tests/psubus_vi8.ispc
index 3c00308f..46005204 100644
--- a/tests/psubus_vi8.ispc
+++ b/tests/psubus_vi8.ispc
@@ -2,7 +2,7 @@
 export uniform int width() { return programCount; }
 
 export void f_f(uniform float RET[], uniform float aFOO[]) {
-    varying int8 a = 0, b = 255; // min and max unsigned int8
+    varying unsigned int8 a = 0, b = 255; // min and max unsigned int8
     RET[programIndex] = psubus(a, b);
 }