diff --git a/src/modules/partition/tests/3a-min-too-large.conf b/src/modules/partition/tests/3a-min-too-large.conf
new file mode 100644
index 000000000..096f823d7
--- /dev/null
+++ b/src/modules/partition/tests/3a-min-too-large.conf
@@ -0,0 +1,5 @@
+---
+efi:
+    recommendedSize:    133MiB
+    minimumSize:        200MiB
+    label:              "bigmin"
diff --git a/src/modules/partition/tests/ConfigTests.cpp b/src/modules/partition/tests/ConfigTests.cpp
index ee8150501..5e7d4d524 100644
--- a/src/modules/partition/tests/ConfigTests.cpp
+++ b/src/modules/partition/tests/ConfigTests.cpp
@@ -34,6 +34,7 @@ private Q_SLOTS:
     void testEmptyConfig();
     void testLegacySize();
     void testAll();
+    void testWeirdConfig();
 };
 
 ConfigTests::ConfigTests() = default;
@@ -195,6 +196,31 @@ ConfigTests::testAll()
     }
 }
 
+void
+ConfigTests::testWeirdConfig()
+{
+    Config c( nullptr );
+
+    auto* gs = Calamares::JobQueue::instanceGlobalStorage();
+    QVERIFY( gs );
+
+
+    // Config with an invalid minimum size
+    {
+        const auto file = QStringLiteral( BUILD_AS_TEST "/3a-min-too-large.conf" );
+        bool ok = false;
+        c.setConfigurationMap( Calamares::YAML::load( file, &ok ) );
+
+        cDebug() << "Tried to load" << file << "success?" << ok;
+        QVERIFY( ok );
+
+        QCOMPARE( PartUtils::efiFilesystemRecommendedSize(), 133_MiB );
+        QCOMPARE( PartUtils::efiFilesystemMinimumSize(), 133_MiB );  // Config setting was ignored
+
+        QCOMPARE( gs->value( "efiSystemPartitionName" ).toString(), QStringLiteral( "bigmin" ) );
+    }
+}
+
 
 QTEST_GUILESS_MAIN( ConfigTests )