diff --git a/test/testautomation_clipboard.c b/test/testautomation_clipboard.c
index f943ffee7..417d95746 100644
--- a/test/testautomation_clipboard.c
+++ b/test/testautomation_clipboard.c
@@ -121,7 +121,7 @@ clipboard_testClipboardTextFunctions(void *arg)
     SDLTest_AssertCheck(
         charResult[0] == '\0',
         "Verify SDL_GetClipboardText returned string with length 0, got length %i",
-        SDL_strlen(charResult));
+        (int) SDL_strlen(charResult));
     intResult = SDL_SetClipboardText((const char *)text);
     SDLTest_AssertPass("Call to SDL_SetClipboardText succeeded");
     SDLTest_AssertCheck(
diff --git a/test/testautomation_keyboard.c b/test/testautomation_keyboard.c
index b2c3b9ae1..6f25bb76c 100644
--- a/test/testautomation_keyboard.c
+++ b/test/testautomation_keyboard.c
@@ -312,7 +312,7 @@ keyboard_getSetModState(void *arg)
    /* Get state, cache for later reset */
    result = SDL_GetModState();
    SDLTest_AssertPass("Call to SDL_GetModState()");
-   SDLTest_AssertCheck(result >=0 && result <= allStates, "Verify result from call is valid, expected: 0 <= result <= %i, got: %i", allStates, result);
+   SDLTest_AssertCheck(/*result >= 0 &&*/ result <= allStates, "Verify result from call is valid, expected: 0 <= result <= %i, got: %i", allStates, result);
    currentState = result;
 
    /* Set random state */
diff --git a/test/testautomation_platform.c b/test/testautomation_platform.c
index 5211a4a70..1849d0bbd 100644
--- a/test/testautomation_platform.c
+++ b/test/testautomation_platform.c
@@ -309,7 +309,7 @@ int platform_testGetSetClearError(void *arg)
      len = SDL_strlen(lastError);
      SDLTest_AssertCheck(len == SDL_strlen(testError),
              "SDL_GetError(): expected message len %i, was len: %i",
-             SDL_strlen(testError),
+             (int) SDL_strlen(testError),
              len);
      SDLTest_AssertCheck(SDL_strcmp(lastError, testError) == 0,
              "SDL_GetError(): expected message %s, was message: %s",
@@ -347,7 +347,7 @@ int platform_testSetErrorEmptyInput(void *arg)
      len = SDL_strlen(lastError);
      SDLTest_AssertCheck(len == SDL_strlen(testError),
              "SDL_GetError(): expected message len %i, was len: %i",
-             SDL_strlen(testError),
+             (int) SDL_strlen(testError),
              len);
      SDLTest_AssertCheck(SDL_strcmp(lastError, testError) == 0,
              "SDL_GetError(): expected message '%s', was message: '%s'",
@@ -380,7 +380,7 @@ int platform_testSetErrorInvalidInput(void *arg)
    SDLTest_AssertPass("SDL_ClearError()");
 
    /* Check for no-op */
-   result = SDL_SetError(invalidError);
+   result = SDL_SetError("%s", invalidError);
    SDLTest_AssertPass("SDL_SetError()");
    SDLTest_AssertCheck(result == -1, "SDL_SetError: expected -1, got: %i", result);
    lastError = (char *)SDL_GetError();
@@ -395,12 +395,12 @@ int platform_testSetErrorInvalidInput(void *arg)
    }
 
    /* Set */
-   result = SDL_SetError(probeError);
+   result = SDL_SetError("%s", probeError);
    SDLTest_AssertPass("SDL_SetError('%s')", probeError);
    SDLTest_AssertCheck(result == -1, "SDL_SetError: expected -1, got: %i", result);
 
    /* Check for no-op */
-   result = SDL_SetError(invalidError);
+   result = SDL_SetError("%s", invalidError);
    SDLTest_AssertPass("SDL_SetError(NULL)");
    SDLTest_AssertCheck(result == -1, "SDL_SetError: expected -1, got: %i", result);
    lastError = (char *)SDL_GetError();
@@ -419,7 +419,7 @@ int platform_testSetErrorInvalidInput(void *arg)
    SDLTest_AssertPass("SDL_ClearError()");
 
    /* Set and check */
-   result = SDL_SetError(probeError);
+   result = SDL_SetError("%s", probeError);
    SDLTest_AssertPass("SDL_SetError()");
    SDLTest_AssertCheck(result == -1, "SDL_SetError: expected -1, got: %i", result);
    lastError = (char *)SDL_GetError();
@@ -430,7 +430,7 @@ int platform_testSetErrorInvalidInput(void *arg)
      len = SDL_strlen(lastError);
      SDLTest_AssertCheck(len == SDL_strlen(probeError),
              "SDL_GetError(): expected message len %i, was len: %i",
-             SDL_strlen(probeError),
+             (int) SDL_strlen(probeError),
              len);
      SDLTest_AssertCheck(SDL_strcmp(lastError, probeError) == 0,
              "SDL_GetError(): expected message '%s', was message: '%s'",
diff --git a/test/testautomation_rwops.c b/test/testautomation_rwops.c
index 16f2161fe..5c4d3e489 100644
--- a/test/testautomation_rwops.c
+++ b/test/testautomation_rwops.c
@@ -111,10 +111,10 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
    s = SDL_RWwrite(rw, RWopsHelloWorldTestString, sizeof(RWopsHelloWorldTestString)-1, 1);
    SDLTest_AssertPass("Call to SDL_RWwrite succeeded");
    if (write) {
-        SDLTest_AssertCheck(s == (size_t)1, "Verify result of writing one byte with SDL_RWwrite, expected 1, got %i", s);
+        SDLTest_AssertCheck(s == (size_t)1, "Verify result of writing one byte with SDL_RWwrite, expected 1, got %i", (int) s);
    }
    else {
-        SDLTest_AssertCheck(s == (size_t)0, "Verify result of writing with SDL_RWwrite, expected: 0, got %i", s);
+        SDLTest_AssertCheck(s == (size_t)0, "Verify result of writing with SDL_RWwrite, expected: 0, got %i", (int) s);
    }
 
    /* Test seek to random position */
@@ -133,8 +133,8 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
    SDLTest_AssertCheck(
        s == (size_t)(sizeof(RWopsHelloWorldTestString)-1),
        "Verify result from SDL_RWread, expected %i, got %i",
-       sizeof(RWopsHelloWorldTestString)-1,
-       s);
+       (int) (sizeof(RWopsHelloWorldTestString)-1),
+       (int) s);
    SDLTest_AssertCheck(
        SDL_memcmp(buf, RWopsHelloWorldTestString, sizeof(RWopsHelloWorldTestString)-1 ) == 0,
        "Verify read bytes match expected string, expected '%s', got '%s'", RWopsHelloWorldTestString, buf);
@@ -144,25 +144,25 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
    SDLTest_AssertPass("Call to SDL_RWseek(...,-4,RW_SEEK_CUR) succeeded");
    SDLTest_AssertCheck(
        i == (Sint64)(sizeof(RWopsHelloWorldTestString)-5),
-       "Verify seek to -4 with SDL_RWseek (RW_SEEK_CUR), expected %i, got %"SDL_PRIs64,
-       sizeof(RWopsHelloWorldTestString)-5,
-       i);
+       "Verify seek to -4 with SDL_RWseek (RW_SEEK_CUR), expected %i, got %i",
+       (int) (sizeof(RWopsHelloWorldTestString)-5),
+       (int) i);
 
    i = SDL_RWseek( rw, -1, RW_SEEK_END );
    SDLTest_AssertPass("Call to SDL_RWseek(...,-1,RW_SEEK_END) succeeded");
    SDLTest_AssertCheck(
        i == (Sint64)(sizeof(RWopsHelloWorldTestString)-2),
-       "Verify seek to -1 with SDL_RWseek (RW_SEEK_END), expected %i, got %"SDL_PRIs64,
-       sizeof(RWopsHelloWorldTestString)-2,
-       i);
+       "Verify seek to -1 with SDL_RWseek (RW_SEEK_END), expected %i, got %i",
+       (int) (sizeof(RWopsHelloWorldTestString)-2),
+       (int) i);
 
    /* Invalid whence seek */
    i = SDL_RWseek( rw, 0, 999 );
    SDLTest_AssertPass("Call to SDL_RWseek(...,0,invalid_whence) succeeded");
    SDLTest_AssertCheck(
        i == (Sint64)(-1),
-       "Verify seek with SDL_RWseek (invalid_whence); expected: -1, got %"SDL_PRIs64,
-       i);
+       "Verify seek with SDL_RWseek (invalid_whence); expected: -1, got %i",
+       (int) i);
 }
 
 /* !
@@ -559,8 +559,8 @@ rwops_testCompareRWFromMemWithRWFromFile(void)
      SDLTest_AssertCheck(result == 0, "Verify result value is 0; got: %d", result);
 
      /* Compare */
-     SDLTest_AssertCheck(rv_mem == rv_file, "Verify returned read blocks matches for mem and file reads; got: rv_mem=%d rv_file=%d", rv_mem, rv_file);
-     SDLTest_AssertCheck(sv_mem == sv_file, "Verify SEEK_END position matches for mem and file seeks; got: sv_mem=%"SDL_PRIu64" sv_file=%"SDL_PRIu64, sv_mem, sv_file);
+     SDLTest_AssertCheck(rv_mem == rv_file, "Verify returned read blocks matches for mem and file reads; got: rv_mem=%d rv_file=%d", (int) rv_mem, (int) rv_file);
+     SDLTest_AssertCheck(sv_mem == sv_file, "Verify SEEK_END position matches for mem and file seeks; got: sv_mem=%d sv_file=%d", (int) sv_mem, (int) sv_file);
      SDLTest_AssertCheck(buffer_mem[slen] == 0, "Verify mem buffer termination; expected: 0, got: %d", buffer_mem[slen]);
      SDLTest_AssertCheck(buffer_file[slen] == 0, "Verify file buffer termination; expected: 0, got: %d", buffer_file[slen]);
      SDLTest_AssertCheck(
@@ -648,27 +648,27 @@ rwops_testFileWriteReadEndian(void)
      /* Write test data */
      objectsWritten = SDL_WriteBE16(rw, BE16value);
      SDLTest_AssertPass("Call to SDL_WriteBE16()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
      objectsWritten = SDL_WriteBE32(rw, BE32value);
      SDLTest_AssertPass("Call to SDL_WriteBE32()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
      objectsWritten = SDL_WriteBE64(rw, BE64value);
      SDLTest_AssertPass("Call to SDL_WriteBE64()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
      objectsWritten = SDL_WriteLE16(rw, LE16value);
      SDLTest_AssertPass("Call to SDL_WriteLE16()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
      objectsWritten = SDL_WriteLE32(rw, LE32value);
      SDLTest_AssertPass("Call to SDL_WriteLE32()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
      objectsWritten = SDL_WriteLE64(rw, LE64value);
      SDLTest_AssertPass("Call to SDL_WriteLE64()");
-     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", objectsWritten);
+     SDLTest_AssertCheck(objectsWritten == 1, "Validate number of objects written, expected: 1, got: %i", (int) objectsWritten);
 
      /* Test seek to start */
      result = SDL_RWseek( rw, 0, RW_SEEK_SET );
      SDLTest_AssertPass("Call to SDL_RWseek succeeded");
-     SDLTest_AssertCheck(result == 0, "Verify result from position 0 with SDL_RWseek, expected 0, got %"SDL_PRIs64, result);
+     SDLTest_AssertCheck(result == 0, "Verify result from position 0 with SDL_RWseek, expected 0, got %i", (int) result);
 
      /* Read test data */
      BE16test = SDL_ReadBE16(rw);
diff --git a/test/testautomation_stdlib.c b/test/testautomation_stdlib.c
index b541995f5..e741d547e 100644
--- a/test/testautomation_stdlib.c
+++ b/test/testautomation_stdlib.c
@@ -25,13 +25,13 @@ stdlib_strlcpy(void *arg)
   expected = "foo";
   SDLTest_AssertPass("Call to SDL_strlcpy(\"foo\")");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), (int) result);
 
   result = SDL_strlcpy(text, "foo", 2);
   expected = "f";
   SDLTest_AssertPass("Call to SDL_strlcpy(\"foo\") with buffer size 2");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", result);
+  SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", (int) result);
 
   return TEST_COMPLETED;
 }
@@ -51,7 +51,7 @@ stdlib_snprintf(void *arg)
   expected = "foo";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%s\", \"foo\")");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, 2, "%s", "foo");
   expected = "f";
@@ -66,49 +66,49 @@ stdlib_snprintf(void *arg)
   expected = "1.000000";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", 1.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%.f", 1.0);
   expected = "1";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%.f\", 1.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%#.f", 1.0);
   expected = "1.";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%#.f\", 1.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%f", 1.0 + 1.0 / 3.0);
   expected = "1.333333";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", 1.0 + 1.0 / 3.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%+f", 1.0 + 1.0 / 3.0);
   expected = "+1.333333";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%+f\", 1.0 + 1.0 / 3.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%.2f", 1.0 + 1.0 / 3.0);
   expected = "1.33";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%.2f\", 1.0 + 1.0 / 3.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%6.2f", 1.0 + 1.0 / 3.0);
   expected = "  1.33";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%6.2f\", 1.0 + 1.0 / 3.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, sizeof(text), "%06.2f", 1.0 + 1.0 / 3.0);
   expected = "001.33";
   SDLTest_AssertPass("Call to SDL_snprintf(\"%%06.2f\", 1.0 + 1.0 / 3.0)");
   SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
-  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", SDL_strlen(text), result);
+  SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int) SDL_strlen(text), result);
 
   result = SDL_snprintf(text, 5, "%06.2f", 1.0 + 1.0 / 3.0);
   expected = "001.";
@@ -146,7 +146,7 @@ stdlib_getsetenv(void *arg)
     text = SDL_getenv(name);
     SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
     if (text != NULL) {
-      SDLTest_Log("Expected: NULL, Got: '%s' (%i)", text, SDL_strlen(text));
+      SDLTest_Log("Expected: NULL, Got: '%s' (%i)", text, (int) SDL_strlen(text));
     }
   } while (text != NULL);