diff --git a/autotests/epubextractortest.cpp b/autotests/epubextractortest.cpp
--- a/autotests/epubextractortest.cpp
+++ b/autotests/epubextractortest.cpp
@@ -22,10 +22,12 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/epubextractor.h"
+#include "mimeutils.h"
 
 #include <QDebug>
 #include <QTest>
 #include <QDir>
+#include <QMimeDatabase>
 
 using namespace KFileMetaData;
 
@@ -38,7 +40,12 @@
 {
     EPubExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath("test.epub"), "application/epub+zip");
+    QString fileName = testFilePath(QStringLiteral("test.epub"));
+    QMimeDatabase mimeDb;
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
diff --git a/autotests/exiv2extractortest.cpp b/autotests/exiv2extractortest.cpp
--- a/autotests/exiv2extractortest.cpp
+++ b/autotests/exiv2extractortest.cpp
@@ -22,10 +22,12 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/exiv2extractor.h"
+#include "mimeutils.h"
 
 #include <QDebug>
 #include <QTest>
 #include <QDir>
+#include <QMimeDatabase>
 
 using namespace KFileMetaData;
 using namespace KFileMetaData::Property;
@@ -39,7 +41,12 @@
 {
     Exiv2Extractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath("test.jpg"), "image/jpeg");
+    QString fileName = testFilePath(QStringLiteral("test.jpg"));
+    QMimeDatabase mimeDb;
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
diff --git a/autotests/odfextractortest.h b/autotests/odfextractortest.h
--- a/autotests/odfextractortest.h
+++ b/autotests/odfextractortest.h
@@ -23,6 +23,7 @@
 #define ODFEXTRACTORTEST_H
 
 #include <QObject>
+#include <QMimeDatabase>
 
 class OdfExtractorTest : public QObject
 {
@@ -38,6 +39,9 @@
 
     void testTextMissingMetaNoCrash();
     void testTextMissingContentNoCrash();
+
+private:
+    QMimeDatabase mimeDb;
 };
 
 #endif // ODFEXTRACTORTEST_H
diff --git a/autotests/odfextractortest.cpp b/autotests/odfextractortest.cpp
--- a/autotests/odfextractortest.cpp
+++ b/autotests/odfextractortest.cpp
@@ -28,6 +28,7 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/odfextractor.h"
+#include "mimeutils.h"
 
 using namespace KFileMetaData;
 
@@ -40,7 +41,11 @@
 {
     OdfExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath(QStringLiteral("test.odt")), QStringLiteral("application/vnd.oasis.opendocument.text"));
+    QString fileName = testFilePath(QStringLiteral("test.odt"));
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
@@ -77,7 +82,11 @@
 {
     OdfExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath(QStringLiteral("test.odp")), QStringLiteral("application/vnd.oasis.opendocument.presentation"));
+    QString fileName = testFilePath(QStringLiteral("test.odp"));
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 2);
diff --git a/autotests/office2007extractortest.cpp b/autotests/office2007extractortest.cpp
--- a/autotests/office2007extractortest.cpp
+++ b/autotests/office2007extractortest.cpp
@@ -22,10 +22,12 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/office2007extractor.h"
+#include "mimeutils.h"
 
 #include <QDebug>
 #include <QTest>
 #include <QDir>
+#include <QMimeDatabase>
 
 using namespace KFileMetaData;
 
@@ -38,7 +40,12 @@
 {
     Office2007Extractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath(QStringLiteral("test_libreoffice.docx")), QStringLiteral("application/vnd.openxmlformats-officedocument.wordprocessingml.document"));
+    QString fileName = testFilePath(QStringLiteral("test_libreoffice.docx"));
+    QMimeDatabase mimeDb;
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
diff --git a/autotests/popplerextractortest.cpp b/autotests/popplerextractortest.cpp
--- a/autotests/popplerextractortest.cpp
+++ b/autotests/popplerextractortest.cpp
@@ -22,10 +22,12 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/popplerextractor.h"
+#include "mimeutils.h"
 
 #include <QDebug>
 #include <QTest>
 #include <QDir>
+#include <QMimeDatabase>
 
 using namespace KFileMetaData;
 
@@ -38,7 +40,12 @@
 {
     PopplerExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath("test.pdf"), "application/pdf");
+    QString fileName = testFilePath(QStringLiteral("test.pdf"));
+    QMimeDatabase mimeDb;
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
diff --git a/autotests/postscriptdscextractortest.h b/autotests/postscriptdscextractortest.h
--- a/autotests/postscriptdscextractortest.h
+++ b/autotests/postscriptdscextractortest.h
@@ -21,6 +21,7 @@
 #define POSTSCRIPTDSCEXTRACTORTEST_H
 
 #include <QObject>
+#include <QMimeDatabase>
 
 class PostscriptDscExtractorTest : public QObject
 {
@@ -31,6 +32,8 @@
 private Q_SLOTS:
     void testPS();
     void testEPS();
+private:
+    QMimeDatabase mimeDb;
 };
 
 #endif // POSTSCRIPTDSCEXTRACTORTEST_H
diff --git a/autotests/postscriptdscextractortest.cpp b/autotests/postscriptdscextractortest.cpp
--- a/autotests/postscriptdscextractortest.cpp
+++ b/autotests/postscriptdscextractortest.cpp
@@ -21,6 +21,7 @@
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/postscriptdscextractor.h"
+#include "mimeutils.h"
 
 #include <QTest>
 
@@ -35,7 +36,11 @@
 {
     DscExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath("test.ps"), "application/postscript");
+    QString fileName = testFilePath(QStringLiteral("test.ps"));
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
@@ -55,7 +60,11 @@
 {
     DscExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath("test.eps"), "image/x-eps");
+    QString fileName = testFilePath(QStringLiteral("test.eps"));
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType);
     plugin.extract(&result);
 
     QCOMPARE(result.types().size(), 1);
diff --git a/autotests/xmlextractortest.cpp b/autotests/xmlextractortest.cpp
--- a/autotests/xmlextractortest.cpp
+++ b/autotests/xmlextractortest.cpp
@@ -21,10 +21,12 @@
 #include "xmlextractortest.h"
 
 #include <QtTest>
+#include <QMimeDatabase>
 
 #include "simpleextractionresult.h"
 #include "indexerextractortestsconfig.h"
 #include "extractors/xmlextractor.h"
+#include "mimeutils.h"
 
 using namespace KFileMetaData;
 
@@ -78,8 +80,12 @@
 {
     XmlExtractor plugin{this};
 
-    SimpleExtractionResult result(testFilePath(QStringLiteral("test_with_metadata.svg")),
-            QStringLiteral("image/svg"),
+    QString fileName = testFilePath(QStringLiteral("test_with_metadata.svg"));
+    QMimeDatabase mimeDb;
+    QString mimeType = MimeUtils::strictMimeType(fileName, mimeDb).name();
+    QVERIFY(plugin.mimetypes().contains(mimeType));
+
+    SimpleExtractionResult result(fileName, mimeType,
             ExtractionResult::ExtractEverything);
     plugin.extract(&result);