diff --git a/package/c/hmpl/test/test.c b/package/c/hmpl/test/test.c
index 367ab9e..cbcedc1 100644
--- a/package/c/hmpl/test/test.c
+++ b/package/c/hmpl/test/test.c
@@ -4,6 +4,93 @@
 #include "hmpl.h"
 #include "hectic.h"
 
+#define TEST_DATA_INTERPOLATION_CONTEXT        \
+  "{\n"                                        \
+  "  \"persona\": {\n"                         \
+  "    \"name\": \"John\",\n"                  \
+  "    \"surname\": \"Doe\",\n"                \
+  "    \"address\": {\n"                       \
+  "      \"home\": {\n"                        \
+  "        \"street\": \"123 Main St\",\n"     \
+  "        \"city\": \"Springfield\",\n"       \
+  "        \"zip\": \"12345\"\n"               \
+  "      },\n"                                 \
+  "      \"work\": {\n"                        \
+  "        \"street\": \"456 Business Rd\",\n" \
+  "        \"city\": \"Metropolis\",\n"        \
+  "        \"zip\": \"67890\"\n"               \
+  "      }\n"                                  \
+  "    },\n"                                   \
+  "    \"contact\": {\n"                       \
+  "      \"email\": \"john@example.com\",\n"   \
+  "      \"phone\": {\n"                       \
+  "        \"home\": \"555-1234\",\n"          \
+  "        \"mobile\": \"555-5678\"\n"         \
+  "      }\n"                                  \
+  "    }\n"                                    \
+  "  }\n"                                      \
+  "}"
+
+#define TEST_DATA_INTERPOLATION_TEMPLATE              \ 
+  "Hello {{persona.name}} {{persona.surname}},\n"     \
+  "\n"                                                \
+  "Your home address:\n"                              \
+  "{{persona.address.home.street}},\n"                \
+  "{{persona.address.home.city}},\n"                  \
+  "{{persona.address.home.zip}}\n"                    \
+  "\n"                                                \
+  "Your work address:\n"                              \
+  "{{persona.address.work.street}},\n"                \
+  "{{persona.address.work.city}},\n"                  \
+  "{{persona.address.work.zip}}\n"                    \
+  "\n"                                                \
+  "Contact information:\n"                            \
+  "Email: {{persona.contact.email}}\n"                \
+  "Home Phone: {{persona.contact.phone.home}}\n"      \
+  "Mobile Phone: {{persona.contact.phone.mobile}}\n"
+
+#define TEST_DATA_INTERPOLATION_RESULT \ 
+      "Hello John Doe,\n"              \
+      "\n"                             \
+      "Your home address:\n"           \
+      "123 Main St,\n"                 \
+      "Springfield,\n"                 \
+      "12345\n"                        \
+      "\n"                             \
+      "Your work address:\n"           \
+      "456 Business Rd,\n"             \
+      "Metropolis,\n"                  \
+      "67890\n"                        \
+      "\n"                             \
+      "Contact information:\n"         \
+      "Email: john@example.com\n"      \
+      "Home Phone: 555-1234\n"         \
+      "Mobile Phone: 555-5678\n"
+
+#define TEST_DATA_INTERPOLATION_WITH_PREFIX_CONTEXT \
+  TEST_DATA_INTERPOLATION_CONTEXT
+
+#define TEST_DATA_INTERPOLATION_WITH_PREFIX_TEMPLATE  \ 
+  "Hello {{.persona.name}} {{.persona.surname}},\n"   \
+  "\n"                                                \
+  "Your home address:\n"                              \
+  "{{.persona.address.home.street}},\n"               \
+  "{{.persona.address.home.city}},\n"                 \
+  "{{.persona.address.home.zip}}\n"                   \
+  "\n"                                                \
+  "Your work address:\n"                              \
+  "{{.persona.address.work.street}},\n"               \
+  "{{.persona.address.work.city}},\n"                 \
+  "{{.persona.address.work.zip}}\n"                   \
+  "\n"                                                \
+  "Contact information:\n"                            \
+  "Email: {{.persona.contact.email}}\n"               \
+  "Home Phone: {{.persona.contact.phone.home}}\n"     \
+  "Mobile Phone: {{.persona.contact.phone.mobile}}\n"
+
+#define TEST_DATA_INTERPOLATION_WITH_PREFIX_RESULT \ 
+  TEST_DATA_INTERPOLATION_RESULT
+
 void test_eval_single_level_key(Arena *arena) {
     char *context_text = arena_strdup(arena, "{\"name\": \"world\"}");
     Json *context = json_parse(arena, &context_text);
@@ -25,73 +112,26 @@ void test_eval_nested_key(Arena *arena) {
 }
 
 void test_render_interpolation_tags(Arena *arena) {
-    char *context_text = arena_strdup(arena, 
-        "{\n"
-        "  \"persona\": {\n"
-        "    \"name\": \"John\",\n"
-        "    \"surname\": \"Doe\",\n"
-        "    \"address\": {\n"
-        "      \"home\": {\n"
-        "        \"street\": \"123 Main St\",\n"
-        "        \"city\": \"Springfield\",\n"
-        "        \"zip\": \"12345\"\n"
-        "      },\n"
-        "      \"work\": {\n"
-        "        \"street\": \"456 Business Rd\",\n"
-        "        \"city\": \"Metropolis\",\n"
-        "        \"zip\": \"67890\"\n"
-        "      }\n"
-        "    },\n"
-        "    \"contact\": {\n"
-        "      \"email\": \"john@example.com\",\n"
-        "      \"phone\": {\n"
-        "        \"home\": \"555-1234\",\n"
-        "        \"mobile\": \"555-5678\"\n"
-        "      }\n"
-        "    }\n"
-        "  }\n"
-        "}");
+    char *context_text = arena_strdup(arena, TEST_DATA_INTERPOLATION_CONTEXT);
     Json *context = json_parse(arena, &context_text);
     if (!context) { raise_exception("Malformed json"); exit(1); }
 
-    char *text = arena_strdup(arena,
-      "Hello {{persona.name}} {{persona.surname}},\n"
-      "\n"
-      "Your home address:\n"
-      "{{persona.address.home.street}},\n"
-      "{{persona.address.home.city}},\n"
-      "{{persona.address.home.zip}}\n"
-      "\n"
-      "Your work address:\n"
-      "{{persona.address.work.street}},\n"
-      "{{persona.address.work.city}},\n"
-      "{{persona.address.work.zip}}\n"
-      "\n"
-      "Contact information:\n"
-      "Email: {{persona.contact.email}}\n"
-      "Home Phone: {{persona.contact.phone.home}}\n"
-      "Mobile Phone: {{persona.contact.phone.mobile}}\n"); 
+    char *text = arena_strdup(arena, TEST_DATA_INTERPOLATION_TEMPLATE); 
 
-    hmpl_render_with_arena(arena, &text, context);
-    assert(strcmp(text, 
-      "Hello John Doe,\n"
-      "\n"
-      "Your home address:\n"
-      "123 Main St,\n"
-      "Springfield,\n"
-      "12345\n"
-      "\n"
-      "Your work address:\n"
-      "456 Business Rd,\n"
-      "Metropolis,\n"
-      "67890\n"
-      "\n"
-      "Contact information:\n"
-      "Email: john@example.com\n"
-      "Home Phone: 555-1234\n"
-      "Mobile Phone: 555-5678\n") == 0);
+    hmpl_render_interpolation_tags(arena, &text, context, "");
+    assert(strcmp(text, TEST_DATA_INTERPOLATION_RESULT) == 0);
 }
 
+void test_render_interpolation_tags_with_prefix(Arena *arena) {
+    char *context_text = arena_strdup(arena, TEST_DATA_INTERPOLATION_WITH_PREFIX_CONTEXT);
+    Json *context = json_parse(arena, &context_text);
+    if (!context) { raise_exception("Malformed json"); exit(1); }
+
+    char *text = arena_strdup(arena, TEST_DATA_INTERPOLATION_WITH_PREFIX_TEMPLATE); 
+
+    hmpl_render_interpolation_tags(arena, &text, context, ".");
+    assert(strcmp(text, TEST_DATA_INTERPOLATION_WITH_PREFIX_RESULT) == 0);
+}
 
 int main(void) {
     Arena arena = arena_init(1024 * 1024);
@@ -99,6 +139,7 @@ int main(void) {
     test_eval_single_level_key(&arena);
     test_eval_nested_key(&arena);
     test_render_interpolation_tags(&arena);
+    test_render_interpolation_tags_with_prefix(&arena);
 
     printf("All tests passed.\n");