diff --git a/backend/common.c b/backend/common.c
index ac91b112..eac8fdb2 100644
--- a/backend/common.c
+++ b/backend/common.c
@@ -487,20 +487,30 @@ INTERNAL int set_height(struct zint_symbol *symbol, const float min_row_height,
         if (row_height < 0.5f) { /* Absolute minimum */
             row_height = 0.5f;
         }
-        if (min_row_height && stripf(row_height) < stripf(min_row_height)) {
-            error_number = ZINT_WARN_NONCOMPLIANT;
-            if (!no_errtxt) {
-                strcpy(symbol->errtxt, "247: Height not compliant with standards");
+        if (min_row_height) {
+            /* This seems necessary to get gcc 12.2.1 to work consistently for static 32-bit builds */
+            volatile const float row_height_strip = stripf(row_height);
+            volatile const float min_row_height_strip = stripf(min_row_height);
+            if (row_height_strip < min_row_height_strip) {
+                error_number = ZINT_WARN_NONCOMPLIANT;
+                if (!no_errtxt) {
+                    strcpy(symbol->errtxt, "247: Height not compliant with standards");
+                }
             }
         }
         symbol->height = stripf(row_height * zero_count + fixed_height);
     } else {
         symbol->height = stripf(fixed_height); /* Ignore any given height */
     }
-    if (max_height && stripf(symbol->height) > stripf(max_height)) {
-        error_number = ZINT_WARN_NONCOMPLIANT;
-        if (!no_errtxt) {
-            strcpy(symbol->errtxt, "248: Height not compliant with standards");
+    if (max_height) {
+        /* See above */
+        volatile const float symbol_height_strip = stripf(symbol->height);
+        volatile const float max_height_strip = stripf(max_height);
+        if (symbol_height_strip > max_height_strip) {
+            error_number = ZINT_WARN_NONCOMPLIANT;
+            if (!no_errtxt) {
+                strcpy(symbol->errtxt, "248: Height not compliant with standards");
+            }
         }
     }
 
diff --git a/backend/tests/test_library.c b/backend/tests/test_library.c
index 1aded07c..d3486ec8 100644
--- a/backend/tests/test_library.c
+++ b/backend/tests/test_library.c
@@ -837,6 +837,10 @@ static void test_encode_file_unreadable(void) {
 #ifdef _WIN32
     testSkip("Test not implemented on Windows");
 #else
+    if (getuid() == 0) {
+        testSkip("Test not available as root");
+        return;
+    }
 
     symbol = ZBarcode_Create();
     assert_nonnull(symbol, "Symbol not created\n");
diff --git a/frontend/tests/test_args.c b/frontend/tests/test_args.c
index 7acee653..232c7c3a 100644
--- a/frontend/tests/test_args.c
+++ b/frontend/tests/test_args.c
@@ -803,7 +803,7 @@ static void test_checks(int index, int debug) {
 
     char cmd[4096];
     char buf[4096];
-    char *outfilename = "out.gif";
+    const char *outfilename = "out.gif";
 
     testStart("test_checks");
 
@@ -1064,7 +1064,7 @@ static void test_barcode_symbology(int index, int debug) {
 
     char cmd[4096];
     char buf[8192];
-    char *outfilename = "out.gif";
+    const char *outfilename = "out.gif";
 
     testStart("test_barcode_symbology");
 
@@ -1158,6 +1158,11 @@ static void test_other_opts(int index, int debug) {
 
     char cmd[4096];
     char buf[8192];
+#ifdef NO_PNG
+    const char *outfilename = "out.gif";
+#else
+    const char *outfilename = "out.png";
+#endif
 
     testStart("test_other_opts");
 
@@ -1183,6 +1188,9 @@ static void test_other_opts(int index, int debug) {
             assert_nonnull(strstr(buf, data[i].expected), "i:%d strstr buf (%s) != expected (%s) (%s)\n", i, buf, data[i].expected, cmd);
         } else {
             assert_zero(strcmp(buf, data[i].expected), "i:%d strcmp buf (%s) != expected (%s) (%s)\n", i, buf, data[i].expected, cmd);
+            if (strstr(data[i].expected, "Error") == NULL) {
+                assert_zero(remove(outfilename), "i:%d remove(%s) != 0 (%d: %s)\n", i, outfilename, errno, strerror(errno));
+            }
         }
     }
 
@@ -1214,6 +1222,11 @@ static void test_exit_status(int index, int debug) {
 
     char cmd[4096];
     char buf[8192];
+#ifdef NO_PNG
+    const char *outfilename = "out.gif";
+#else
+    const char *outfilename = "out.png";
+#endif
 
     testStart("test_exit_status");
 
@@ -1237,6 +1250,9 @@ static void test_exit_status(int index, int debug) {
 
         assert_nonnull(exec(cmd, buf, sizeof(buf) - 1, debug, i, &exit_status), "i:%d exec(%s) NULL\n", i, cmd);
         assert_equal(exit_status, data[i].expected, "i:%d exit_status %d != expected (%d) (%s), (cmd: %s)\n", i, exit_status, data[i].expected, buf, cmd);
+        if (data[i].expected < ZINT_ERROR) {
+            assert_zero(remove(outfilename), "i:%d remove(%s) != 0 (%d: %s)\n", i, outfilename, errno, strerror(errno));
+        }
     }
 
     testFinish();