diff --git a/tests/suites/test_suite_platform_printf.data b/tests/suites/test_suite_platform_printf.data
index 693f069..1ed68d5 100644
--- a/tests/suites/test_suite_platform_printf.data
+++ b/tests/suites/test_suite_platform_printf.data
@@ -1,6 +1,6 @@
 # The test cases for printf and integers have two purposes: they exercise
 # the printf function family, and they exercise the passing of integers
-# through the test framework.
+# and strings through the test framework.
 
 printf "%d", 0
 printf_int:"%d":0:"0"
@@ -55,3 +55,44 @@
 
 printf "%d", -0x80000000
 printf_int:"%d":-0x80000000:"-2147483648"
+
+# The next few test cases exercise how the test framework handles special
+# characters in strings.
+printf "%c", SPACE, SPACE
+printf_char2:"%c%c":SPACE_CHAR:SPACE_CHAR:"  "
+
+printf "%c", NEWLINE, SPACE
+printf_char2:"%c%c":NEWLINE_CHAR:SPACE_CHAR:"\n "
+
+printf "%c", DOUBLE QUOTE, SPACE
+printf_char2:"%c%c":DOUBLE_QUOTE_CHAR:SPACE_CHAR:"\" "
+
+printf "%c", COLON, SPACE
+printf_char2:"%c%c":COLON_CHAR:SPACE_CHAR:"\: "
+
+printf "%c", BACKSLASH, SPACE
+printf_char2:"%c%c":BACKSLASH_CHAR:SPACE_CHAR:"\\ "
+
+printf "%c", SPACE, BACKSLASH
+printf_char2:"%c%c":SPACE_CHAR:BACKSLASH_CHAR:" \\"
+
+printf "%c%c", COLON, COLON
+printf_char2:"%c%c":COLON_CHAR:COLON_CHAR:"\:\:"
+
+printf "%c%c", COLON, NEWLINE
+printf_char2:"%c%c":COLON_CHAR:NEWLINE_CHAR:"\:\n"
+
+printf "%c%c", BACKSLASH, NEWLINE
+printf_char2:"%c%c":BACKSLASH_CHAR:NEWLINE_CHAR:"\\\n"
+
+printf "%c%c", BACKSLASH, DOUBLE QUOTE
+printf_char2:"%c%c":BACKSLASH_CHAR:DOUBLE_QUOTE_CHAR:"\\\""
+
+printf "%c%c", BACKSLASH, COLON
+printf_char2:"%c%c":BACKSLASH_CHAR:COLON_CHAR:"\\\:"
+
+printf "%c%c", BACKSLASH, BACKSLASH
+printf_char2:"%c%c":BACKSLASH_CHAR:BACKSLASH_CHAR:"\\\\"
+
+printf "%c%c", BACKSLASH, n
+printf_char2:"%c%c":BACKSLASH_CHAR:LOWERCASE_N_CHAR:"\\n"
diff --git a/tests/suites/test_suite_platform_printf.function b/tests/suites/test_suite_platform_printf.function
index 51d3c6d..f050d6e 100644
--- a/tests/suites/test_suite_platform_printf.function
+++ b/tests/suites/test_suite_platform_printf.function
@@ -4,6 +4,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+
+#define NEWLINE_CHAR '\n'
+#define SPACE_CHAR ' '
+#define DOUBLE_QUOTE_CHAR '"'
+#define COLON_CHAR ':'
+#define BACKSLASH_CHAR '\\'
+#define LOWERCASE_N_CHAR 'n'
 /* END_HEADER */
 
 /* BEGIN_CASE */
@@ -23,3 +30,21 @@
     mbedtls_free(output);
 }
 /* END_CASE */
+
+/* BEGIN_CASE */
+void printf_char2(char *format, int arg1, int arg2, char *result)
+{
+    char *output = NULL;
+    const size_t n = strlen(result);
+
+    /* Nominal case: buffer just large enough */
+    ASSERT_ALLOC(output, n + 1);
+    TEST_EQUAL(n, mbedtls_snprintf(output, n + 1, format, arg1, arg2));
+    ASSERT_COMPARE(result, n + 1, output, n + 1);
+    mbedtls_free(output);
+    output = NULL;
+
+exit:
+    mbedtls_free(output);
+}
+/* END_CASE */