diff --git a/src/libcalamares/utils/CommandList.h b/src/libcalamares/utils/CommandList.h
index 17a251a7c..331127c1e 100644
--- a/src/libcalamares/utils/CommandList.h
+++ b/src/libcalamares/utils/CommandList.h
@@ -104,6 +104,8 @@ public:
     /** @brief empty command-list with timeout to apply to entries. */
     CommandList( bool doChroot = true, std::chrono::seconds timeout = std::chrono::seconds( 10 ) );
     CommandList( const QVariant& v, bool doChroot = true, std::chrono::seconds timeout = std::chrono::seconds( 10 ) );
+    CommandList( int ) = delete;
+    CommandList( const QVariant&, int ) = delete;
 
     bool doChroot() const { return m_doChroot; }
     std::chrono::seconds defaultTimeout() const { return m_timeout; }
diff --git a/src/libcalamares/utils/Tests.cpp b/src/libcalamares/utils/Tests.cpp
index 89dd45dfb..fd1411d38 100644
--- a/src/libcalamares/utils/Tests.cpp
+++ b/src/libcalamares/utils/Tests.cpp
@@ -364,8 +364,14 @@ commands:
     QCOMPARE( m[ "commands" ].toList().count(), 4 );
 
     {
-        // Take care! The second parameter is a bool, so "3" here means "true"
+#ifdef THIS_DOES_NOT_COMPILE_AND_THATS_THE_POINT
+        // Take care! The second parameter is a bool, so "3" here would
+        // mean "true", except the int overload is deleted to prevent just that.
         Calamares::CommandList cmds( m[ "commands" ], 3 );
+        // .. and there's no conversion from std::chrono::duration to bool either.
+        Calamares::CommandList cmds( m[ "commands" ], std::chrono::seconds( 3 ) );
+#endif
+        Calamares::CommandList cmds( m[ "commands" ], true );
         QCOMPARE( cmds.defaultTimeout(), std::chrono::seconds( 10 ) );
         // But the 4 commands are there anyway
         QCOMPARE( cmds.count(), 4 );