diff --git a/SingleSource/UnitTests/2020-01-06-coverage-001.c b/SingleSource/UnitTests/2020-01-06-coverage-001.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-001.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-001.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 int32_t *a;
 uint8_t b = 7;
@@ -32,8 +33,8 @@
   a = &temp_1;
   d();
 
-  printf("b = %i\n", b);
-  printf("x = %i\n", x);
+  printf("b = %" PRIu8 "\n", b);
+  printf("x = %" PRIi32 "\n", x);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-002.c b/SingleSource/UnitTests/2020-01-06-coverage-002.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-002.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-002.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 int32_t a, c, e;
 int8_t b;
@@ -65,14 +66,14 @@
   a = val_1;
   z = f();
 
-  printf("a = %i\n", a);
-  printf("b = %i\n", b);
-  printf("c = %i\n", c);
-  printf("d = %i\n", d);
-  printf("x = %i\n", x);
-  printf("e = %i\n", e);
-  printf("z = %li\n", z);
-  printf("y = %li\n", y);
+  printf("a = %" PRIi32 "\n", a);
+  printf("b = %" PRIi8 "\n", b);
+  printf("c = %" PRIi32 "\n", c);
+  printf("d = %" PRIi16 "\n", d);
+  printf("x = %" PRIi32 "\n", x);
+  printf("e = %" PRIi32 "\n", e);
+  printf("z = %" PRIi64 "\n", z);
+  printf("y = %" PRIi64 "\n", y);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-003.c b/SingleSource/UnitTests/2020-01-06-coverage-003.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-003.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-003.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 int8_t a;
 int32_t x;
@@ -17,8 +18,8 @@
   a = val_1;
   b();
 
-  printf("a = %i\n", a);
-  printf("x = %i\n", x);
+  printf("a = %" PRIi8 "\n", a);
+  printf("x = %" PRIi32 "\n", x);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-004.c b/SingleSource/UnitTests/2020-01-06-coverage-004.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-004.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-004.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 int32_t a, b;
 
@@ -56,12 +57,12 @@
   j();
   y = h(h_call_argument_1);
 
-  printf("a = %i\n", a);
-  printf("b = %i\n", b);
-  printf("d.c = %i\n", d.c);
-  printf("y = %li\n", y);
-  printf("h_call_argument_1 = %i\n", h_call_argument_1);
-  printf("x = %li\n", x);
+  printf("a = %" PRIi32 "\n", a);
+  printf("b = %" PRIi32 "\n", b);
+  printf("d.c = %" PRIu16 "\n", d.c);
+  printf("y = %" PRIi64 "\n", y);
+  printf("h_call_argument_1 = %" PRIi32 "\n", h_call_argument_1);
+  printf("x = %" PRIi64 "\n", x);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-005.c b/SingleSource/UnitTests/2020-01-06-coverage-005.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-005.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-005.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 uint32_t a, c, d;
 uint64_t b;
@@ -81,11 +82,11 @@
   h();
   g();
 
-  printf("a = %i\n", a);
-  printf("b = %li\n", b);
-  printf("c = %i\n", c);
-  printf("d = %i\n", d);
-  printf("e = %i\n", e);
+  printf("a = %" PRIu32 "\n", a);
+  printf("b = %" PRIu64 "\n", b);
+  printf("c = %" PRIu32 "\n", c);
+  printf("d = %" PRIu32 "\n", d);
+  printf("e = %" PRIi16 "\n", e);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-005.reference_output b/SingleSource/UnitTests/2020-01-06-coverage-005.reference_output
--- a/SingleSource/UnitTests/2020-01-06-coverage-005.reference_output
+++ b/SingleSource/UnitTests/2020-01-06-coverage-005.reference_output
@@ -1,6 +1,6 @@
 a = 16777101
 b = 2
-c = -6
+c = 4294967290
 d = 0
 e = -9
 exit 0
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-006.c b/SingleSource/UnitTests/2020-01-06-coverage-006.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-006.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-006.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 #pragma pack(1)
 
@@ -31,9 +32,9 @@
   b.a = val_1;
   d();
 
-  printf("b.a = %i\n", b.a);
-  printf("c = %i\n", c);
-  printf("x = %i\n", x);
+  printf("b.a = %u\n", b.a);
+  printf("c = %" PRIi32 "\n", c);
+  printf("x = %" PRIi32 "\n", x);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-007.c b/SingleSource/UnitTests/2020-01-06-coverage-007.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-007.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-007.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 uint32_t a;
 const uint32_t b = -1L, c;
@@ -24,10 +25,10 @@
   a = val_1;
   e();
 
-  printf("a = %i\n", a);
-  printf("b = %i\n", b);
-  printf("c = %i\n", c);
-  printf("d = %i\n", d);
+  printf("a = %" PRIu32 "\n", a);
+  printf("b = %" PRIu32 "\n", b);
+  printf("c = %" PRIu32 "\n", c);
+  printf("d = %" PRIi16 "\n", d);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-007.reference_output b/SingleSource/UnitTests/2020-01-06-coverage-007.reference_output
--- a/SingleSource/UnitTests/2020-01-06-coverage-007.reference_output
+++ b/SingleSource/UnitTests/2020-01-06-coverage-007.reference_output
@@ -1,5 +1,5 @@
 a = 3
-b = -1
+b = 4294967295
 c = 0
 d = 0
 exit 0
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-008.c b/SingleSource/UnitTests/2020-01-06-coverage-008.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-008.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-008.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 struct a {
   int64_t b;
@@ -35,11 +36,11 @@
   e = h.c;
   f(&h);
 
-  printf("d.b = %li\n", d.b);
-  printf("d.c = %li\n", d.c);
-  printf("s.b = %li\n", s.b);
-  printf("s.c = %li\n", s.c);
-  printf("e = %li\n", e);
+  printf("d.b = %" PRIi64 "\n", d.b);
+  printf("d.c = %" PRIi64 "\n", d.c);
+  printf("s.b = %" PRIi64 "\n", s.b);
+  printf("s.c = %" PRIi64 "\n", s.c);
+  printf("e = %" PRIi64 "\n", e);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-009.c b/SingleSource/UnitTests/2020-01-06-coverage-009.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-009.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-009.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 uint32_t a, b, h;
 int16_t c, g;
@@ -43,12 +44,12 @@
   a = val_1;
   i();
 
-  printf("a = %i\n", a);
-  printf("b = %i\n", b);
-  printf("c = %i\n", c);
-  printf("d = %i\n", d);
-  printf("g = %i\n", g);
-  printf("h = %i\n", h);
+  printf("a = %" PRIu32 "\n", a);
+  printf("b = %" PRIu32 "\n", b);
+  printf("c = %" PRIi16 "\n", c);
+  printf("d = %" PRIu8 "\n", d);
+  printf("g = %" PRIi16 "\n", g);
+  printf("h = %" PRIu32 "\n", h);
 
   return 0;
 }
diff --git a/SingleSource/UnitTests/2020-01-06-coverage-010.c b/SingleSource/UnitTests/2020-01-06-coverage-010.c
--- a/SingleSource/UnitTests/2020-01-06-coverage-010.c
+++ b/SingleSource/UnitTests/2020-01-06-coverage-010.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <stdio.h>
+#include <inttypes.h>
 
 int32_t *a;
 int32_t b, d, f;
@@ -80,16 +81,16 @@
   a = &temp_1;
   k();
 
-  printf("b = %i\n", b);
-  printf("c = %i\n", c);
-  printf("d = %i\n", d);
-  printf("x = %i\n", x);
-  printf("e = %i\n", e);
-  printf("y = %i\n", y);
-  printf("z = %i\n", z);
-  printf("v = %i\n", v);
-  printf("f = %i\n", f);
-  printf("w = %i\n", w);
+  printf("b = %" PRIi32 "\n", b);
+  printf("c = %" PRIi8 "\n", c);
+  printf("d = %" PRIi32 "\n", d);
+  printf("x = %" PRIi32 "\n", x);
+  printf("e = %" PRIi32 "\n", e);
+  printf("y = %" PRIi32 "\n", y);
+  printf("z = %" PRIi32 "\n", z);
+  printf("v = %" PRIi32 "\n", v);
+  printf("f = %" PRIi32 "\n", f);
+  printf("w = %" PRIi32 "\n", w);
 
   return 0;
 }