diff --git a/unittest/ligature_table_test.cc b/unittest/ligature_table_test.cc
index 44ada686..404c2b12 100644
--- a/unittest/ligature_table_test.cc
+++ b/unittest/ligature_table_test.cc
@@ -17,6 +17,7 @@
 
 namespace tesseract {
 
+#if 0 // not with NFC normalization
 const char kEngNonLigatureText[] = "fidelity effigy ſteep";
 // Same as above text, but with "fi" in the first word and "ffi" in the second
 // word replaced with their respective ligatures.
@@ -24,6 +25,7 @@ const char kEngLigatureText[] = "fidelity effigy ſteep";
 // Same as kEngLigatureText but with "fi" in both words replaced with their
 // ligature. The test Verdana font does not support the "ffi" or "ſt" ligature.
 const char kRenderableEngLigatureText[] = "fidelity effigy ſteep";
+#endif
 
 static PangoFontMap *font_map;
 
@@ -54,6 +56,7 @@ TEST_F(LigatureTableTest, DoesFillLigatureTables) {
   EXPECT_GT(lig_table_->lig_to_norm_table().size(), 0);
 }
 
+#if 0 // not with NFC normalization
 TEST_F(LigatureTableTest, DoesAddLigatures) {
   EXPECT_STREQ(kEngLigatureText, lig_table_->AddLigatures(kEngNonLigatureText, nullptr).c_str());
 }
@@ -76,6 +79,7 @@ TEST_F(LigatureTableTest, DoesNotAddLigaturesWithUnsupportedFont) {
 TEST_F(LigatureTableTest, DoesRemoveLigatures) {
   EXPECT_STREQ(kEngNonLigatureText, lig_table_->RemoveLigatures(kEngLigatureText).c_str());
 }
+#endif
 
 TEST_F(LigatureTableTest, TestCustomLigatures) {
   const char *kTestCases[] = {
@@ -89,6 +93,7 @@ TEST_F(LigatureTableTest, TestCustomLigatures) {
   }
 }
 
+#if 0 // not with NFC normalization
 TEST_F(LigatureTableTest, TestRemovesCustomLigatures) {
   const char *kTestCases[] = {
       "fiction",
@@ -100,4 +105,6 @@ TEST_F(LigatureTableTest, TestRemovesCustomLigatures) {
     EXPECT_STREQ(kTestCases[i + 2], lig_table_->RemoveCustomLigatures(kTestCases[i + 1]).c_str());
   }
 }
+#endif
+
 } // namespace tesseract
diff --git a/unittest/stringrenderer_test.cc b/unittest/stringrenderer_test.cc
index fd846a91..34a8e180 100644
--- a/unittest/stringrenderer_test.cc
+++ b/unittest/stringrenderer_test.cc
@@ -313,10 +313,12 @@ TEST_F(StringRendererTest, DoesLigatureTextForRendering) {
   EXPECT_EQ(strlen(kEngNonLigatureText),
             renderer_->RenderToImage(kEngNonLigatureText, strlen(kEngNonLigatureText), &pix));
   pix.destroy();
+#if 0 // not with NFC normalization
   // There should be one less box than letters due to the 'fi' ligature.
   EXPECT_EQ(strlen(kEngNonLigatureText) - 1, renderer_->GetBoxes().size());
   // The output box text should be ligatured.
   EXPECT_STREQ("fi", renderer_->GetBoxes()[0]->ch().c_str());
+#endif
 }
 
 TEST_F(StringRendererTest, DoesRetainInputLigatureForRendering) {