diff --git a/src/cmdforge/gui/dialogs/test_step_dialog.py b/src/cmdforge/gui/dialogs/test_step_dialog.py
index 8e53dc8..d9019cd 100644
--- a/src/cmdforge/gui/dialogs/test_step_dialog.py
+++ b/src/cmdforge/gui/dialogs/test_step_dialog.py
@@ -163,9 +163,11 @@ class TestStepDialog(QDialog):
         # Assertions table
         self.assertions_table = QTableWidget(0, 3)
         self.assertions_table.setHorizontalHeaderLabels(["Type", "Value", ""])
-        self.assertions_table.horizontalHeader().setSectionResizeMode(0, QHeaderView.ResizeToContents)
+        self.assertions_table.horizontalHeader().setSectionResizeMode(0, QHeaderView.Fixed)
         self.assertions_table.horizontalHeader().setSectionResizeMode(1, QHeaderView.Stretch)
-        self.assertions_table.horizontalHeader().setSectionResizeMode(2, QHeaderView.ResizeToContents)
+        self.assertions_table.horizontalHeader().setSectionResizeMode(2, QHeaderView.Fixed)
+        self.assertions_table.setColumnWidth(0, 130)
+        self.assertions_table.setColumnWidth(2, 40)
         self.assertions_table.verticalHeader().setVisible(False)
         self.assertions_table.setMaximumHeight(150)
         assert_layout.addWidget(self.assertions_table)
@@ -302,6 +304,7 @@ class TestStepDialog(QDialog):
         # Type dropdown
         type_combo = QComboBox()
         type_combo.setMinimumHeight(28)
+        type_combo.setMinimumWidth(120)
         for type_id, display_name, tooltip in self.ASSERTION_TYPES:
             type_combo.addItem(display_name, type_id)
             idx = type_combo.count() - 1