diff --git a/Orange/widgets/model/owcurvefit.py b/Orange/widgets/model/owcurvefit.py
index 11ad6bcd35b..f70eb5ea29e 100644
--- a/Orange/widgets/model/owcurvefit.py
+++ b/Orange/widgets/model/owcurvefit.py
@@ -386,6 +386,7 @@ def __insert_into_expression(self, what: str, offset=0):
         self.__expression_edit.setCursorPosition(pos + len(what) - offset)
         self.__expression_edit.setFocus()
 
+    @OWBaseLearner.Inputs.data
     def set_data(self, data: Optional[Table]):
         self.Warning.data_missing(shown=not bool(data))
         self.learner = None
diff --git a/Orange/widgets/model/owsvm.py b/Orange/widgets/model/owsvm.py
index 9b58d94fab2..8587a7cebdd 100644
--- a/Orange/widgets/model/owsvm.py
+++ b/Orange/widgets/model/owsvm.py
@@ -206,6 +206,7 @@ def _on_kernel_changed(self):
         self._show_right_kernel()
         self.settings_changed()
 
+    @OWBaseLearner.Inputs.data
     def set_data(self, data):
         self.Warning.sparse_data.clear()
         super().set_data(data)
diff --git a/Orange/widgets/utils/tests/concurrent_example.py b/Orange/widgets/utils/tests/concurrent_example.py
index 9117eca6060..3fa8453dcdd 100644
--- a/Orange/widgets/utils/tests/concurrent_example.py
+++ b/Orange/widgets/utils/tests/concurrent_example.py
@@ -103,6 +103,7 @@ def on_exception(self, ex: Exception):
         raise ex
 
     # OWDataProjectionWidget
+    @OWDataProjectionWidget.Inputs.data
     def set_data(self, data: Table):
         super().set_data(data)
         if self._invalidated:
diff --git a/Orange/widgets/visualize/owfreeviz.py b/Orange/widgets/visualize/owfreeviz.py
index 6db04a29f4e..c9435ad55e9 100644
--- a/Orange/widgets/visualize/owfreeviz.py
+++ b/Orange/widgets/visualize/owfreeviz.py
@@ -232,6 +232,7 @@ def on_exception(self, ex: Exception):
         self.run_button.setText("Start")
 
     # OWAnchorProjectionWidget
+    @OWAnchorProjectionWidget.Inputs.data
     def set_data(self, data):
         super().set_data(data)
         self.graph.set_sample_size(None)
diff --git a/Orange/widgets/visualize/owlinearprojection.py b/Orange/widgets/visualize/owlinearprojection.py
index 48fcdf888af..8baa07524e2 100644
--- a/Orange/widgets/visualize/owlinearprojection.py
+++ b/Orange/widgets/visualize/owlinearprojection.py
@@ -362,6 +362,7 @@ def colors_changed(self):
         super().colors_changed()
         self._init_vizrank()
 
+    @OWAnchorProjectionWidget.Inputs.data
     def set_data(self, data):
         super().set_data(data)
         self._check_options()
diff --git a/Orange/widgets/visualize/owradviz.py b/Orange/widgets/visualize/owradviz.py
index 781723c6ba7..0046cd2f7c2 100644
--- a/Orange/widgets/visualize/owradviz.py
+++ b/Orange/widgets/visualize/owradviz.py
@@ -382,6 +382,7 @@ def colors_changed(self):
         super().colors_changed()
         self._init_vizrank()
 
+    @OWAnchorProjectionWidget.Inputs.data
     def set_data(self, data):
         super().set_data(data)
         self._init_vizrank()
diff --git a/Orange/widgets/visualize/owscatterplot.py b/Orange/widgets/visualize/owscatterplot.py
index 9947ab30a98..d877d0c722c 100644
--- a/Orange/widgets/visualize/owscatterplot.py
+++ b/Orange/widgets/visualize/owscatterplot.py
@@ -447,6 +447,7 @@ def _vizrank_color_change(self):
         self.vizrank_button.setEnabled(not err_msg)
         self.vizrank_button.setToolTip(err_msg)
 
+    @OWDataProjectionWidget.Inputs.data
     def set_data(self, data):
         super().set_data(data)
         self._vizrank_color_change()
@@ -558,6 +559,7 @@ def switch_sampling(self):
             self.add_data()
             self.__timer.start()
 
+    @OWDataProjectionWidget.Inputs.data_subset
     def set_subset_data(self, subset_data):
         self.warning()
         if isinstance(subset_data, SqlTable):