diff --git a/src/parser/clarity-parser-flow-tests.ts b/src/parser/clarity-parser-flow-tests.ts
index 3ac09f3..520b7c5 100644
--- a/src/parser/clarity-parser-flow-tests.ts
+++ b/src/parser/clarity-parser-flow-tests.ts
@@ -81,6 +81,9 @@ export function extractTestAnnotationsAndCalls(
       lastFunctionName = functionName;
     }
   }
+  if (indexStart < 0) {
+    return [functionAnnotations, functionBodies];
+  }
   const lastFunctionBody = contractSource.substring(indexStart + headerLength);
   contractCalls = extractContractCalls(lastFunctionBody, simnet);
   functionBodies[lastFunctionName] = contractCalls;
diff --git a/tests/clarity-parser-flow.test.ts b/tests/clarity-parser-flow.test.ts
index b920136..662dfa6 100644
--- a/tests/clarity-parser-flow.test.ts
+++ b/tests/clarity-parser-flow.test.ts
@@ -74,4 +74,17 @@ describe("verify clarity parser for flow tests", () => {
     });
     expect(callInfos["test-bad-flow"].length).toEqual(1);
   });
+
+  it("should return empty results when no test functions exist", () => {
+    const [annotations, callInfos] = extractTestAnnotationsAndCalls(
+      fs.readFileSync(
+        path.join(__dirname, "./contracts/parser-tests/no-flow.clar"),
+        "utf8"
+      ),
+      simnet
+    );
+
+    expect(annotations).toEqual({});
+    expect(callInfos).toEqual({});
+  });
 });
diff --git a/tests/contracts/parser-tests/no-flow.clar b/tests/contracts/parser-tests/no-flow.clar
new file mode 100644
index 0000000..a9b2ab3
--- /dev/null
+++ b/tests/contracts/parser-tests/no-flow.clar
@@ -0,0 +1,4 @@
+;; A contract without any flow tests
+(define-public (not-a-test)
+  (ok true)
+)