diff --git a/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp b/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
index 178969fcab4c2..1167479e099af 100644
--- a/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
+++ b/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
@@ -1209,16 +1209,16 @@ void HTMLParser::parse_generic_raw_text_element(HTMLToken& token)
     m_insertion_mode = InsertionMode::Text;
 }
 
-static bool is_empty_text_node(DOM::Node const* node)
+static bool is_text_node(DOM::Node const* node)
 {
-    return node && node->is_text() && static_cast<DOM::Text const*>(node)->data().is_empty();
+    return node && node->is_text();
 }
 
 DOM::Text* HTMLParser::find_character_insertion_node()
 {
     auto adjusted_insertion_location = find_appropriate_place_for_inserting_node();
     if (adjusted_insertion_location.insert_before_sibling) {
-        if (is_empty_text_node(adjusted_insertion_location.insert_before_sibling->previous_sibling()))
+        if (is_text_node(adjusted_insertion_location.insert_before_sibling->previous_sibling()))
             return static_cast<DOM::Text*>(adjusted_insertion_location.insert_before_sibling->previous_sibling());
         auto new_text_node = realm().create<DOM::Text>(document(), String {});
         adjusted_insertion_location.parent->insert_before(*new_text_node, *adjusted_insertion_location.insert_before_sibling);
@@ -1226,7 +1226,7 @@ DOM::Text* HTMLParser::find_character_insertion_node()
     }
     if (adjusted_insertion_location.parent->is_document())
         return nullptr;
-    if (is_empty_text_node(adjusted_insertion_location.parent->last_child()))
+    if (is_text_node(adjusted_insertion_location.parent->last_child()))
         return static_cast<DOM::Text*>(adjusted_insertion_location.parent->last_child());
     auto new_text_node = realm().create<DOM::Text>(document(), String {});
     MUST(adjusted_insertion_location.parent->append_child(*new_text_node));
@@ -1237,7 +1237,10 @@ void HTMLParser::flush_character_insertions()
 {
     if (m_character_insertion_builder.is_empty())
         return;
-    m_character_insertion_node->set_data(MUST(m_character_insertion_builder.to_string()));
+    if (m_character_insertion_node->data().is_empty())
+        m_character_insertion_node->set_data(MUST(m_character_insertion_builder.to_string()));
+    else
+        (void)m_character_insertion_node->append_data(MUST(m_character_insertion_builder.to_string()));
     m_character_insertion_builder.clear();
 }
 
diff --git a/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_template-write_single.txt b/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_template-write_single.txt
index 787d7c2b4dad0..b67bc38f66a47 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_template-write_single.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_template-write_single.txt
@@ -2,15 +2,14 @@ Harness status: OK
 
 Found 111 tests
 
-94 Pass
-17 Fail
-Fail	html5lib_template.html 010950d55f4eccf16e9c4af1d263bb747294c646
-Fail	html5lib_template.html a838bd54410cef059a42eea9606356488e16535b
+111 Pass
+Pass	html5lib_template.html 010950d55f4eccf16e9c4af1d263bb747294c646
+Pass	html5lib_template.html a838bd54410cef059a42eea9606356488e16535b
 Pass	html5lib_template.html 27fb9111f6675a7e033b867480c0afddcda161a6
-Fail	html5lib_template.html aee883a65775489399a003b2371d58248a6aff6f
+Pass	html5lib_template.html aee883a65775489399a003b2371d58248a6aff6f
 Pass	html5lib_template.html 89b17b54ab343191bf74ef5434f4d2cfac40ea97
 Pass	html5lib_template.html c4433556c7414cfd71f27b420f1ffc4348774f5e
-Fail	html5lib_template.html 3dcce7d97108b3e9ea7fa96f240ac62bf280e74b
+Pass	html5lib_template.html 3dcce7d97108b3e9ea7fa96f240ac62bf280e74b
 Pass	html5lib_template.html a1f587f7ea85ccfe294bd45bfb501e850cb979e0
 Pass	html5lib_template.html cd26a7832f13bdc135697321ca6c2fecdca6ef5d
 Pass	html5lib_template.html e30571d90b0e56864499961eb7be955994cf72e2
@@ -47,7 +46,7 @@ Pass	html5lib_template.html f915e7b3407c24b28c3aad318e5693cc774020f4
 Pass	html5lib_template.html 3c5eb261787b3d15aff86fa61de773fd7e439b0e
 Pass	html5lib_template.html 2b57775750c198d4b98b23aed74ff80a866a01f5
 Pass	html5lib_template.html dc3d016610f3ab532525a6c2871f03d6b62b0168
-Fail	html5lib_template.html 6a184d71d00580a26a8b6bd97aafe5503339f3f6
+Pass	html5lib_template.html 6a184d71d00580a26a8b6bd97aafe5503339f3f6
 Pass	html5lib_template.html ce570a6c4bcee8b72a03e25508c6dd72e3cc6c35
 Pass	html5lib_template.html e0c3d922f7b1f1654f02f716c3d9b31198ce3385
 Pass	html5lib_template.html 87e67242bf6debcf3b7dca852d10aa0f7b625b28
@@ -61,7 +60,7 @@ Pass	html5lib_template.html 275060925a844cb51b29bae660301de9780d68c8
 Pass	html5lib_template.html 9f82f6ec4c0a48c1d4dfbe6803b94abd553aea88
 Pass	html5lib_template.html f094bf7e94a88b86c80a0643e70c8e5ff3354698
 Pass	html5lib_template.html 35a07ec3b4bf26ea407dc1ddf52f14195a714059
-Fail	html5lib_template.html 24faa53b271f994a4ff31d5796c8ff47d6f2c3e6
+Pass	html5lib_template.html 24faa53b271f994a4ff31d5796c8ff47d6f2c3e6
 Pass	html5lib_template.html 0f1c491b58c2dd3c402a62e37f833bc1f1db8d21
 Pass	html5lib_template.html 868d918a7b5d8b5c065c15229492bc2022bfbcba
 Pass	html5lib_template.html 0538efa44e857596c556033a3821d424378aea3f
@@ -73,16 +72,16 @@ Pass	html5lib_template.html 9bd9687a65f258adc24450fc5cbd781fff6c038a
 Pass	html5lib_template.html db1baeb846d718c773324746524fbd68f2e9436e
 Pass	html5lib_template.html 4b0ce46c611dbcc016db272ef007f302bee0c897
 Pass	html5lib_template.html 1a735e1c7f28f8701f3c7fd5e9404b8911916086
-Fail	html5lib_template.html 0686eedec06b2db1dc283fac92c1ef1a33114c71
+Pass	html5lib_template.html 0686eedec06b2db1dc283fac92c1ef1a33114c71
 Pass	html5lib_template.html d4dfb87ce626f12923056a6cd77448eaf4660ac2
 Pass	html5lib_template.html 1f295920f2937b2c8023b3761c43a0d4d9e5353c
 Pass	html5lib_template.html 3b91fa08fad923d387d924cff37fbf6b4c3a5712
 Pass	html5lib_template.html 45a1c1ad5d99ad67c573096a79253996a664e01b
 Pass	html5lib_template.html 0fe3a66773c6048c8f6f2c92f2611f65be972ec1
 Pass	html5lib_template.html be40897ca411e1507197c31ab2a9f9752a05f769
-Fail	html5lib_template.html dcfb1048ed5c40e406b4fbf0cde24c826713907f
-Fail	html5lib_template.html 78263aeea68ac97903598682013bae9c0c21d547
-Fail	html5lib_template.html 5aa177ef1a35bf4502dcb867d8e666288982ba99
+Pass	html5lib_template.html dcfb1048ed5c40e406b4fbf0cde24c826713907f
+Pass	html5lib_template.html 78263aeea68ac97903598682013bae9c0c21d547
+Pass	html5lib_template.html 5aa177ef1a35bf4502dcb867d8e666288982ba99
 Pass	html5lib_template.html 5d303375907dc4d4380b477e0317c17b660613e9
 Pass	html5lib_template.html d822f726927c34b92fe102b13e63920850878f6a
 Pass	html5lib_template.html 07acdcaeb4fa639296d46673cf28823ddf2a6ca7
@@ -97,21 +96,21 @@ Pass	html5lib_template.html 1125967cbbcd404f4cb14d48270b8ec778970d77
 Pass	html5lib_template.html 32c963e164b9ec82c60e490bb141c1ccc70b992f
 Pass	html5lib_template.html 574a95fc9c9f2de3aeaa0c9ee1e6967fc3d4770d
 Pass	html5lib_template.html 332863a7f9e61bff32bd3427ede7a088b790d453
-Fail	html5lib_template.html 2121db07146781773df9e53b94fa921a805175ce
-Fail	html5lib_template.html 8675de267cd7e34f2febdee3feb665614d1562fe
+Pass	html5lib_template.html 2121db07146781773df9e53b94fa921a805175ce
+Pass	html5lib_template.html 8675de267cd7e34f2febdee3feb665614d1562fe
 Pass	html5lib_template.html c5d26ad923a2b1e988ddd378ca4fb26eb48353e1
 Pass	html5lib_template.html eec1542e2fa0e9eafb7f8d4a51eae56b5a31b3c8
 Pass	html5lib_template.html b79387a54c3b136db0f28ed96555ff683b3947fe
 Pass	html5lib_template.html c477a29a4deb32d072a415fa809a84a4f2beee0c
 Pass	html5lib_template.html 26e4480c08e1f5f7b6ac8b8c1832ab0312e3b7c5
 Pass	html5lib_template.html 24b3b50fdd0bf8d5cf2ebaa6bf502d7bcfde1da4
-Fail	html5lib_template.html d3704c68528357189eb5826ab66eea071d6137a5
+Pass	html5lib_template.html d3704c68528357189eb5826ab66eea071d6137a5
 Pass	html5lib_template.html d958f7d44faf772d1fb60f1a8f186f837ca735d9
 Pass	html5lib_template.html 3fc4d97fa68fc2658356bdbd4e051c867de8de53
-Fail	html5lib_template.html 94820107bbf3fab3f82de1f717e8413aead7d3a6
+Pass	html5lib_template.html 94820107bbf3fab3f82de1f717e8413aead7d3a6
 Pass	html5lib_template.html ed920bca1fe1f5ad471bbd81adf8a41f3e2d9b06
 Pass	html5lib_template.html 657c00ebdda37ae060cc69633ed98482ccc29e18
 Pass	html5lib_template.html 649fc955a4b60ab2a5b881d94c9493eb4a545002
-Fail	html5lib_template.html 977041956eb9c7b9db73935168aba92f77c079f6
-Fail	html5lib_template.html fafee395fea124791df59bafeb1136342b64d3c6
-Fail	html5lib_template.html d5a8beecf5d3c53e947772ad887808d132334aa1
\ No newline at end of file
+Pass	html5lib_template.html 977041956eb9c7b9db73935168aba92f77c079f6
+Pass	html5lib_template.html fafee395fea124791df59bafeb1136342b64d3c6
+Pass	html5lib_template.html d5a8beecf5d3c53e947772ad887808d132334aa1
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_tests18-write_single.txt b/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_tests18-write_single.txt
index d469d551734da..1bba043bfc769 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_tests18-write_single.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/html/syntax/parsing/html5lib_tests18-write_single.txt
@@ -2,8 +2,7 @@ Harness status: OK
 
 Found 35 tests
 
-34 Pass
-1 Fail
+35 Pass
 Pass	html5lib_tests18.html 7471f6a45872ac6d70f69fc3f4e10b13c7c1ac45
 Pass	html5lib_tests18.html 0d0085749435e0d0ddb56c9db809bfcbbc995767
 Pass	html5lib_tests18.html 9052b915187ac505be8958ab5e9f8d4ca0bfde81
@@ -18,7 +17,7 @@ Pass	html5lib_tests18.html 9ac591f40aae947707f7d5e83947712bbeca9574
 Pass	html5lib_tests18.html d44cf9a5fcf0759fce78497c7f10e3019c361274
 Pass	html5lib_tests18.html e4eb33f77ae641718853d2cfddbdb2eece6b266b
 Pass	html5lib_tests18.html 53ce5b102579af9830bf561b634af681bbdb5dfd
-Fail	html5lib_tests18.html cd24d93d1235e4aabbdcfab1d3acdbe488325666
+Pass	html5lib_tests18.html cd24d93d1235e4aabbdcfab1d3acdbe488325666
 Pass	html5lib_tests18.html abae66ad61e145e32fb4fc4946b839f56b16bb3d
 Pass	html5lib_tests18.html 9d38e0731d08aec061003c7783c70e682221378b
 Pass	html5lib_tests18.html 9df08923a41bf58c6291f9ce6d9e36a29d336bd6
diff --git a/Tests/LibWeb/Text/expected/wpt-import/html/webappapis/dynamic-markup-insertion/document-write/051.txt b/Tests/LibWeb/Text/expected/wpt-import/html/webappapis/dynamic-markup-insertion/document-write/051.txt
index 92ac8cb6c6a92..6348b92102be4 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/html/webappapis/dynamic-markup-insertion/document-write/051.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/html/webappapis/dynamic-markup-insertion/document-write/051.txt
@@ -2,5 +2,5 @@ Harness status: OK
 
 Found 1 tests
 
-1 Fail
-Fail	document.write \r\n
\ No newline at end of file
+1 Pass
+Pass	document.write \r\n
\ No newline at end of file