diff --git a/src/lib/time.cpp b/src/lib/time.cpp
index 5181c5fc9..83ffa4e53 100644
--- a/src/lib/time.cpp
+++ b/src/lib/time.cpp
@@ -105,13 +105,13 @@ namespace { // implementation helper
 
 
 long
-lumiera_quantise_frames (gavl_time_t time, gavl_time_t grid, gavl_time_t origin)
+lumiera_quantise_frames (gavl_time_t time, gavl_time_t origin, gavl_time_t grid)
 {
   return calculate_quantisation (time, origin, grid);
 }
 
 gavl_time_t
-lumiera_quantise_time (gavl_time_t time, gavl_time_t grid, gavl_time_t origin)
+lumiera_quantise_time (gavl_time_t time, gavl_time_t origin, gavl_time_t grid)
 {
   int64_t count = calculate_quantisation (time, origin, grid);
   gavl_time_t alignedTime = count * grid;
diff --git a/src/lib/time.h b/src/lib/time.h
index 5d22908b1..873157e7f 100644
--- a/src/lib/time.h
+++ b/src/lib/time.h
@@ -102,7 +102,7 @@ lumiera_tmpbuf_print_time (gavl_time_t time);
  * @warning the resulting value is limited to (Time::Min, Time::MAX) 
  */
 long
-lumiera_quantise_frames (gavl_time_t time, double grid, gavl_time_t origin);
+lumiera_quantise_frames (gavl_time_t time, gavl_time_t origin, gavl_time_t grid);
 
 /**
  * Similar to #lumiera_quantise_frames, but returns a grid aligned \em time value
diff --git a/tests/40components.tests b/tests/40components.tests
index 0afb978db..97bacd935 100644
--- a/tests/40components.tests
+++ b/tests/40components.tests
@@ -663,7 +663,7 @@ return: 0
 END
 
 
-PLANNED "Quantiser API basics" QuantiserBasics_test  <<END
+TEST "Quantiser API basics" QuantiserBasics_test  <<END
 return: 0
 END
 
diff --git a/tests/lib/time/quantiser-basics-test.cpp b/tests/lib/time/quantiser-basics-test.cpp
index 537d51a49..c719f404b 100644
--- a/tests/lib/time/quantiser-basics-test.cpp
+++ b/tests/lib/time/quantiser-basics-test.cpp
@@ -101,7 +101,7 @@ namespace test{
         : FixedFrameQuantiser
         {
           TestQuant (int origin=0)
-            : FixedFrameQuantiser( FrameRate(3,GAVL_TIME_SCALE), TimeValue(origin))
+            : FixedFrameQuantiser( FrameRate(GAVL_TIME_SCALE, 3 ), TimeValue(origin))
             { }
           
           int
@@ -157,6 +157,7 @@ namespace test{
           CHECK (Time::MAX - Time(1) <= case1.gridAlign( Time (0)  ));
           CHECK (Time::MAX           >  case1.gridAlign( Time (0)  ));
           CHECK (Time::MAX           == case1.gridAlign( Time(+1)  ));
+          CHECK (Time::MAX           == case1.gridAlign( Time(+2)  ));
         }
     };