diff --git a/src/parser.h b/src/parser.h
index 0f1e993..147af3a 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -71,11 +71,6 @@ struct Parser2 {
     std::ignore = push({N_WHITESPACE, N_VALUE});
   }
 
-  void prime(char *buf, int len) {
-    this->buf = buf;
-    this->bufEnd = buf + len;
-  }
-
   enum Status {
     // Accept input
     S_OK,
@@ -87,7 +82,11 @@ struct Parser2 {
     S_OVERFLOW,
   };
 
-  [[nodiscard]] Status parse() { return keepGoing(this); }
+  [[nodiscard]] Status parse(char *buf, int len) {
+    this->buf = buf;
+    this->bufEnd = buf + len;
+    return keepGoing(this);
+  }
 
   Parser2(Parser2 const &) = delete;
   Parser2 &operator=(Parser2 const &) = delete;
diff --git a/src/test.cpp b/src/test.cpp
index 6c0bd57..88b2aaf 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -542,18 +542,15 @@ TEST_CASE("parser2") {
     Parser2 parser(&c, &state);
     int i = 0;
     for (; i < copy.length() - 1; ++i) {
-      parser.prime(copy.data() + i, 1);
-      REQUIRE(parser.parse() == Parser2::S_AGAIN);
+      REQUIRE(parser.parse(copy.data() + i, 1) == Parser2::S_AGAIN);
     }
-    parser.prime(copy.data() + i, 1);
-    CHECK(parser.parse() == Parser2::S_OK);
+    CHECK(parser.parse(copy.data() + i, 1) == Parser2::S_OK);
     puts("");
   }
   {
     std::string copy = "{\"x\": [], \"y\": {}}";
     Parser2 parser(&c, &state);
-    parser.prime(copy.data(), copy.length());
-    CHECK(parser.parse() == Parser2::S_OK);
+    CHECK(parser.parse(copy.data(), copy.length()) == Parser2::S_OK);
     puts("");
   }
 }
@@ -578,8 +575,7 @@ TEST_CASE("bench2") {
   bench.run("parser2", [&]() {
     auto copy = json;
     Parser2 parser(&c, nullptr);
-    parser.prime(copy.data(), copy.length());
-    bench.doNotOptimizeAway(parser.parse());
+    bench.doNotOptimizeAway(parser.parse(copy.data(), copy.length()));
   });
 }