diff --git a/docs/scripts/summaryplot.rst b/docs/scripts/summaryplot.rst
index fdf70e48b..6a44784f7 100644
--- a/docs/scripts/summaryplot.rst
+++ b/docs/scripts/summaryplot.rst
@@ -3,7 +3,7 @@ SUMMARYPLOT
 ===========
 
 ``summaryplot`` is a command line utility to generate plots from Eclipse
-simulations, based on `libecl <http://github.com/equinor/libecl>`_
+simulations, based on `resdata <http://github.com/equinor/resdata>`_
 for processing Eclipse output files and
 `matplotlib <http://matplotlib.sourceforge.net>`_ for plotting.
 
diff --git a/src/subscript/check_swatinit/check_swatinit.py b/src/subscript/check_swatinit/check_swatinit.py
index fc26c94c9..5baf0e0aa 100644
--- a/src/subscript/check_swatinit/check_swatinit.py
+++ b/src/subscript/check_swatinit/check_swatinit.py
@@ -326,7 +326,7 @@ def qc_flag(qc_frame: pd.DataFrame) -> pd.DataFrame:
 
     contact = "OWC" if "OWC" in qc_frame else "GWC"
 
-    # Eclipse and libecl does not calculate cell centres to the same decimals.
+    # Eclipse and resdata does not calculate cell centres to the same decimals.
     # Add some tolerance when testing towards fluid contacts.
     contacttolerance = 1e-4
 
diff --git a/src/subscript/restartthinner/restartthinner.py b/src/subscript/restartthinner/restartthinner.py
index 1937236d1..e0f27428a 100644
--- a/src/subscript/restartthinner/restartthinner.py
+++ b/src/subscript/restartthinner/restartthinner.py
@@ -30,9 +30,9 @@
 def find_resdata_app(toolname: str) -> str:
     """Locate path of apps in resdata.
 
-    These have varying suffixes due through the history of libecl Makefiles.
+    These have varying suffixes due through the history of resdata Makefiles.
 
-    Depending on libecl-version, it has the .x or the .c.x suffix
+    Depending on resdata-version, it has the .x or the .c.x suffix
     We prefer .x.
 
     Returns:
@@ -75,7 +75,7 @@ def rd_repacker(rstfilename: str, slicerstindices: list, quiet: bool) -> None:
     modify the original filename.
     """
     out = " >/dev/null" if quiet else ""
-    # Error early if libecl tools are not available
+    # Error early if resdata tools are not available
     try:
         find_resdata_app("rd_unpack")
         find_resdata_app("rd_pack")
diff --git a/tests/test_check_swatinit.py b/tests/test_check_swatinit.py
index c52cb014f..24919a433 100644
--- a/tests/test_check_swatinit.py
+++ b/tests/test_check_swatinit.py
@@ -713,7 +713,7 @@ def test_reek(tmp_path, mocker):
     assert Path("volplot.png").exists()
 
     # pylint: disable=no-member  # false positive on Pandas dataframe
-    # Check that we never get -1e20 from libecl in any data:
+    # Check that we never get -1e20 from resdata in any data:
     assert np.isclose(qc_frame.select_dtypes("number").min().min(), -7097, atol=1)
     assert np.isclose(qc_frame.select_dtypes("number").max().max(), 5938824, atol=1)
 
diff --git a/tests/test_check_swatinit_simulators.py b/tests/test_check_swatinit_simulators.py
index 27461f028..b7b848b26 100644
--- a/tests/test_check_swatinit_simulators.py
+++ b/tests/test_check_swatinit_simulators.py
@@ -469,7 +469,7 @@ def test_swatinit_less_than_1_below_contact(simulator, tmp_path):
         assert np.isclose(qc_frame["PC_SCALING"][0], 1.0)
         assert np.isclose(qc_frame["PC"], 0)
     else:
-        # E100 will not report a PPCW in this case, libecl gives -1e20,
+        # E100 will not report a PPCW in this case, resdata gives -1e20,
         # which becomes a NaN through res2df and then NaN columns are dropped.
         if "PPCW" in qc_frame:
             assert pd.isnull(qc_frame["PPCW"][0])