diff --git a/tests/polyester.cpp b/tests/polyester.cpp
index 19d21d74..ee425300 100644
--- a/tests/polyester.cpp
+++ b/tests/polyester.cpp
@@ -68,12 +68,12 @@ double get_average_tension(MoorDynLine line,
 	// not that accurate
 	double tension = 0.0;
 	double force[3];
-	REQUIRE(MoorDyn_GetPointForce(anchor, force) == MOORDYN_SUCCESS);
-	tension += vec_norm(force);
+	// REQUIRE(MoorDyn_GetPointForce(anchor, force) == MOORDYN_SUCCESS);
+	// tension += vec_norm(force);
 	REQUIRE(MoorDyn_GetPointForce(fairlead, force) == MOORDYN_SUCCESS);
 	tension += vec_norm(force);
 	for (unsigned int i = 0; i < n; i++) {
-		REQUIRE(MoorDyn_GetLineNodeTen(line, i + 1, force) == MOORDYN_SUCCESS);
+		REQUIRE(MoorDyn_GetLineNodeTen(line, i, force) == MOORDYN_SUCCESS);
 		tension += vec_norm(force);
 	}
 	return tension / (n + 1);
diff --git a/tests/test_poliester.py b/tests/test_poliester.py
index 5b718203..21be8d3e 100644
--- a/tests/test_poliester.py
+++ b/tests/test_poliester.py
@@ -25,12 +25,12 @@ def get_average_tension(line, anchor, fairlead):
     # connections instead of the line end up nodes, as long as the latter are
     # not that accurate
     tension = 0.0
-    force = moordyn.GetPointForce(anchor)
-    tension += vec_norm(force)
+    # force = moordyn.GetPointForce(anchor)
+    # tension += vec_norm(force)
     force = moordyn.GetPointForce(fairlead)
     tension += vec_norm(force)
     for i in range(n):
-        force = moordyn.GetLineNodeTen(line, i + 1)
+        force = moordyn.GetLineNodeTen(line, i)
         tension += vec_norm(force)
     return tension / (n + 1)