diff --git a/tests/include/test/asn1_helpers.h b/tests/include/test/asn1_helpers.h
index ddcc0c9..91ae260 100644
--- a/tests/include/test/asn1_helpers.h
+++ b/tests/include/test/asn1_helpers.h
@@ -22,5 +22,29 @@
 
 #include "test/helpers.h"
 
+/** Skip past an INTEGER in an ASN.1 buffer.
+ *
+ * Mark the current test case as failed in any of the following conditions:
+ * - The buffer does not start with an ASN.1 INTEGER.
+ * - The integer's size or parity does not match the constraints expressed
+ *   through \p min_bits, \p max_bits and \p must_be_odd.
+ *
+ * \param p             Upon entry, `*p` points to the first byte of the
+ *                      buffer to parse.
+ *                      On successful return, `*p` points to the first byte
+ *                      after the parsed INTEGER.
+ *                      On failure, `*p` is unspecified.
+ * \param end           The end of the ASN.1 buffer.
+ * \param min_bits      Fail the test case if the integer does not have at
+ *                      least this many significant bits.
+ * \param max_bits      Fail the test case if the integer has more than
+ *                      this many significant bits.
+ * \param must_be_odd   Fail the test case if the integer is even.
+ *
+ * \return              \c 0 if the test failed, otherwise 1.
+ */
+int mbedtls_test_asn1_skip_integer( unsigned char **p, const unsigned char *end,
+                                    size_t min_bits, size_t max_bits,
+                                    int must_be_odd );
 
 #endif /* ASN1_HELPERS_H */
diff --git a/tests/src/asn1_helpers.c b/tests/src/asn1_helpers.c
index 6ffdca9..79aa166 100644
--- a/tests/src/asn1_helpers.c
+++ b/tests/src/asn1_helpers.c
@@ -23,3 +23,52 @@
 #include <test/helpers.h>
 #include <test/macros.h>
 
+#if defined(MBEDTLS_ASN1_PARSE_C)
+
+#include <mbedtls/asn1.h>
+
+int mbedtls_test_asn1_skip_integer( unsigned char **p, const unsigned char *end,
+                                    size_t min_bits, size_t max_bits,
+                                    int must_be_odd )
+{
+    size_t len;
+    size_t actual_bits;
+    unsigned char msb;
+    TEST_EQUAL( mbedtls_asn1_get_tag( p, end, &len,
+                                      MBEDTLS_ASN1_INTEGER ),
+                0 );
+
+    /* Check if the retrieved length doesn't extend the actual buffer's size.
+     * It is assumed here, that end >= p, which validates casting to size_t. */
+    TEST_ASSERT( len <= (size_t)( end - *p) );
+
+    /* Tolerate a slight departure from DER encoding:
+     * - 0 may be represented by an empty string or a 1-byte string.
+     * - The sign bit may be used as a value bit. */
+    if( ( len == 1 && ( *p )[0] == 0 ) ||
+        ( len > 1 && ( *p )[0] == 0 && ( ( *p )[1] & 0x80 ) != 0 ) )
+    {
+        ++( *p );
+        --len;
+    }
+    if( min_bits == 0 && len == 0 )
+        return( 1 );
+    msb = ( *p )[0];
+    TEST_ASSERT( msb != 0 );
+    actual_bits = 8 * ( len - 1 );
+    while( msb != 0 )
+    {
+        msb >>= 1;
+        ++actual_bits;
+    }
+    TEST_ASSERT( actual_bits >= min_bits );
+    TEST_ASSERT( actual_bits <= max_bits );
+    if( must_be_odd )
+        TEST_ASSERT( ( ( *p )[len-1] & 1 ) != 0 );
+    *p += len;
+    return( 1 );
+exit:
+    return( 0 );
+}
+
+#endif /* MBEDTLS_ASN1_PARSE_C */
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 37cc551..f0b8647 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -12,6 +12,7 @@
 #include "psa/crypto.h"
 #include "psa_crypto_slot_management.h"
 
+#include "test/asn1_helpers.h"
 #include "test/psa_crypto_helpers.h"
 
 /** An invalid export length that will never be set by psa_export_key(). */
@@ -818,50 +819,6 @@
     return( ok );
 }
 
-int asn1_skip_integer( unsigned char **p, const unsigned char *end,
-                       size_t min_bits, size_t max_bits,
-                       int must_be_odd )
-{
-    size_t len;
-    size_t actual_bits;
-    unsigned char msb;
-    TEST_EQUAL( mbedtls_asn1_get_tag( p, end, &len,
-                                      MBEDTLS_ASN1_INTEGER ),
-                0 );
-
-    /* Check if the retrieved length doesn't extend the actual buffer's size.
-     * It is assumed here, that end >= p, which validates casting to size_t. */
-    TEST_ASSERT( len <= (size_t)( end - *p) );
-
-    /* Tolerate a slight departure from DER encoding:
-     * - 0 may be represented by an empty string or a 1-byte string.
-     * - The sign bit may be used as a value bit. */
-    if( ( len == 1 && ( *p )[0] == 0 ) ||
-        ( len > 1 && ( *p )[0] == 0 && ( ( *p )[1] & 0x80 ) != 0 ) )
-    {
-        ++( *p );
-        --len;
-    }
-    if( min_bits == 0 && len == 0 )
-        return( 1 );
-    msb = ( *p )[0];
-    TEST_ASSERT( msb != 0 );
-    actual_bits = 8 * ( len - 1 );
-    while( msb != 0 )
-    {
-        msb >>= 1;
-        ++actual_bits;
-    }
-    TEST_ASSERT( actual_bits >= min_bits );
-    TEST_ASSERT( actual_bits <= max_bits );
-    if( must_be_odd )
-        TEST_ASSERT( ( ( *p )[len-1] & 1 ) != 0 );
-    *p += len;
-    return( 1 );
-exit:
-    return( 0 );
-}
-
 int mbedtls_test_psa_exported_key_sanity_check(
     psa_key_type_t type, size_t bits,
     uint8_t *exported, size_t exported_length )
@@ -913,25 +870,25 @@
                                           MBEDTLS_ASN1_SEQUENCE |
                                           MBEDTLS_ASN1_CONSTRUCTED ), 0 );
         TEST_EQUAL( p + len, end );
-        if( ! asn1_skip_integer( &p, end, 0, 0, 0 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, 0, 0, 0 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, bits, bits, 1 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, 2, bits, 1 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) )
             goto exit;
         /* Require d to be at least half the size of n. */
-        if( ! asn1_skip_integer( &p, end, bits / 2, bits, 1 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits, 1 ) )
             goto exit;
         /* Require p and q to be at most half the size of n, rounded up. */
-        if( ! asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, bits / 2, bits / 2 + 1, 1 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
             goto exit;
-        if( ! asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
+        if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
             goto exit;
         TEST_EQUAL( p, end );
     }
@@ -964,9 +921,9 @@
                                               MBEDTLS_ASN1_CONSTRUCTED ),
                         0 );
             TEST_EQUAL( p + len, end );
-            if( ! asn1_skip_integer( &p, end, bits, bits, 1 ) )
+            if( ! mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) )
                 goto exit;
-            if( ! asn1_skip_integer( &p, end, 2, bits, 1 ) )
+            if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) )
                 goto exit;
             TEST_EQUAL( p, end );
         }
@@ -5632,7 +5589,7 @@
         TEST_EQUAL( 0, mbedtls_asn1_get_tag( &p, end, &len,
                                              MBEDTLS_ASN1_SEQUENCE |
                                              MBEDTLS_ASN1_CONSTRUCTED ) );
-        TEST_ASSERT( asn1_skip_integer( &p, end, bits, bits, 1 ) );
+        TEST_ASSERT( mbedtls_test_asn1_skip_integer( &p, end, bits, bits, 1 ) );
         TEST_EQUAL( 0, mbedtls_asn1_get_tag( &p, end, &len,
                                              MBEDTLS_ASN1_INTEGER ) );
         if( len >= 1 && p[0] == 0 )